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Panasonic EW-DJ10-A Cordless Oral Irrigator Review

Panasonic EW-DJ10-A Cordless Oral Irrigator Review

Our Verdict

Clever collapsible design that makes the flosser ideal for travel.

2 pressure settings and powered by AA batteries add to the package.

The overall performance is good, but the price is perhaps a little high when you consider the alternatives.


  • Compact
  • Cordless
  • AA batteries
  • Waterproof


  • Small tank
  • Messy
  • Value
Preview Product Rating Price
Panasonic EW-DJ10-A Cordless Oral Irrigator Panasonic EW-DJ10-A Cordless Oral Irrigator 5,204 Reviews $81.98

The 3 BIG questions about the Panasonic EW-DJ10-A Cordless Oral Irrigator

If you are short of time, the answers to the following 3 questions should let you know all you need to about the EDW-DJ10-A. If I have missed something, let me know in the comments.

If you want more detail, you can read the full Panasonic water flosser review further down the page.

1. Is there anything drastically wrong with this water flosser?

No, there is certainly nothing drastically wrong with this water flosser. It foes what it is supposed to.

2. Which other oral irrigators should I consider?

There are 2 other cordless water flossers that you should consider alongside the Panasonic.

Both are from market leader, Waterpik.

The WP-560 has a built-in rechargeable battery, whilst the WF-03 Freedom is powered by removable batteries.

Neither collapse quite like this Panasonic, but they each offer their own benefits.

Our Choice
Waterpik Cordless Water Flosser Rechargeable Portable Oral Irrigator for Travel & Home - Cordless Advanced, Wp-560 White
Waterpik Water Flosser Cordless Dental Oral Irrigator for Teeth with Portable Travel Bag and 3 Jet Tips, Cordless Freedom ADA Accepted, WF-03, White
Panasonic Cordless Dental Water Flosser, Dual-Speed Pulse Oral Irrigator, Collapsible, Design for Travel - EW-DJ10-A
Brush Name
Waterpik WP-560
Waterpik WF-03
Panasonic EW-DJ10-A
Customer Rating
Electric Teeth Rating
Our Choice
Waterpik Cordless Water Flosser Rechargeable Portable Oral Irrigator for Travel & Home - Cordless Advanced, Wp-560 White
Brush Name
Waterpik WP-560
Customer Rating
Electric Teeth Rating
Waterpik Water Flosser Cordless Dental Oral Irrigator for Teeth with Portable Travel Bag and 3 Jet Tips, Cordless Freedom ADA Accepted, WF-03, White
Brush Name
Waterpik WF-03
Customer Rating
Electric Teeth Rating
Panasonic Cordless Dental Water Flosser, Dual-Speed Pulse Oral Irrigator, Collapsible, Design for Travel - EW-DJ10-A
Brush Name
Panasonic EW-DJ10-A
Customer Rating
Electric Teeth Rating

3. Where is the best place to buy the Panasonic EW-DJ10-A?

As a well known brand, Panasoinc products would be quite widely stocked, or at least you would think so.

However, their limited range of dental care products means they don’t win the shelf space like some others.

You can buy the EW-DJ10-A online at stores like Amazon, but you can also find this at Walmart and The Home Depot.

Why should you listen to us?

Electric Teeth is an independent website with a mission to simplify dental health.

Our team is a mixture of consumers and dental professionals.

We strive to create honest, informative content, telling you the facts, good or bad.

We are not sponsored by big brands or healthcare companies. Our site is funded by affiliate revenue and ads, but we only recommend products that we have tested and truly believe to be worth your money.

Why not watch this short video to find out all about us?

And now for a bit more detail….

Panasonic is not necessarily the first brand that comes to mind for many when you think of dental health or water flossers, but the Japanese firm does make them.

The EW-DJ10-A cordless oral irrigator is the focus of this review.

For those serious about dental health, in particular, flossing, you will likely have heard of the benefits of water flossing.

Well, the EW-DJ10-A brings these in a portable, wire free solution that can be easily stored in a bag, ideal for those always on the go, but would rather not have to rely on string floss.

Keep reading to find out how we rated it, and be sure to check out our posts on the top rated water flossers, and in particular our recommendations for best cordless water flosser.

What is the EW-DJ10-A Cordless Oral Irrigator?

It is a water flosser, oral irrigator is just another name for this.

A handheld device, it is made up primarily of a pump and a reservoir.

In the reservoir you place water and when powered on, the pump draws the water out and feeds it through a tube at the top of the flosser into your mouth.

A powerful jet of water, forces plaque and bacteria off and away from the teeth and gums.

The stream of water is often softer, less abrasive and a generally more enjoyable method of flossing for many.

Practical Test Panasonic Oral Irrigator EW-DJ10

How to use the EW-DJ10-A Cordless Water Flosser

Assuming batteries have been installed.

Step 1: Prep

Extend the unit from its collapsed position, pulling the blue water tank and White control unit away from each other.

The top of the water tank will align with an arrow on the side of the White unit when fully extended.

If there is resistance when doing this, open up the door to the water reservoir.

Remove the nozzle from the storage point on the back of the unit.  Place it into the hole on the top of the unit and you will hear a click when in place.

Step 2: Fill

Open the reservoir door at the top of the unit and fill the compartment with luke water until it is a little less than full.

Close the door to the reservoir.

Step 3:  Position

Holding the flosser upright, place the tip of the flosser into your mouth.

Lean over the sink.

Close lips enough to prevent splashing, while still allowing water to flow from mouth into the sink.

Step 4: Clean

Power it on, by sliding the switch on the front to 1 of the 2 power settings.

Aim water at the gumline at a 90 degree angle. Follow the gumline and pause briefly between teeth.

Panasonic EW-DJ10-A Cordless Oral Irrigator Review 1

What’s in the box?

  • Panasonic ED-DJ10-A Cordless Oral Irrigator
  • 1 x Nozzle
  • Documentation

The 2 x AA batteries required to power the unit are not supplied.

Panasonic EW-DJ10-A Cordless Oral Irrigator Review 2

Key Features

  • Compact design
  • Cordless
  • Powered by user replaceable AA batteries
  • 2 power settings
  • Rotatable nozzle
  • Waterproof

Pros & Cons

Here are a list of the pro’s and cons having used the EW-DJ10-A.

The Positives

  • Compact – Neat design makes this ideal for travelers.
  • Cordless – Not bound by wires you are free to move around when using this.
  • AA batteries – User removable and replaceable AA batteries power the unit.
  • Waterproof – The unit is waterproof, it can be rinsed and used in the shower.

The Negatives

  • Small tank – Holds enough water for up to 40 seconds, which is not really long enough in many people’s opinions.
  • Messy – Whilst you can master a technique, the steps involved and the amount of water pushed into the mouth means this is not the most enjoyable or flattering experience, you need a sink and even then you can make a bit of a mess.
  • Value – Batteries not included, only 1 nozzle in the box.

Design, usability, clean & general use

By their very nature, a water flosser requires water to function.

Countertop water flossers have large tanks that accommodate 14-23oz, and allow for 60-90 seconds of usage time on average.

The problem with these is that you are tied to a power socket.

Thus portable flossers become appealing.

Giving you more flexibility to move and to take them in a bag when traveling they overcome such a restriction.

But cordless options, by their very nature, cannot offer such large water tank, constrained to what is physically possible for most to hold and use in the hand.

This means that usage time is reduced to 30-45 seconds on average.

It also means that trying to strike a balance between size and function is difficult.

For regular travelers who want the benefits of a water flosser, cordless is the only way to go.

For infrequent travelers, a countertop flosser might be better suited.

Panasonic EW-DJ10-A Cordless Oral Irrigator Review 3

The EW-DJ10-A is aimed at those frequent travelers, or those who want to have a flosser to hand in situations others may not.

Whilst American brand Waterpik may be considered the market leader, Japanese firm Panasonic have designed this irrigator to do something I have not seen from any other.

The innovative design allows the unit to extend and collapse on itself.

This means it is smaller and more compact when not in use, but can be extended when required.

The hands-on images perhaps demonstrate the design best, but a Blue colored reservoir or water tank slides over the main unit and control center that is White in color.

When you want to use it, you pull the 2 pieces away from each other, they slide apart until the Blue plastic tank aligns with an arrow on the side of the main unit.

Panasonic EW-DJ10-A Cordless Oral Irrigator Review 4

Fully extended, the reservoir can now be filled with 5.5oz (160ml) of water for flossing.

To fill it, at the base of the tank is a hinged lid to the compartment, with an o-ring seal that keeps the liquid inside when closed.

Opening the compartment lid is advised to make extending the unit easier too.

Panasonic EW-DJ10-A Cordless Oral Irrigator Review 5

On the back of the unit is a recess into which the detachable nozzle resides for travel.  Pull it out and pop it into the hole on the top of the unit.

When pushed into place, it will click in and you won’t be able to remove it, unless you press the eject button to unclip it.

Panasonic EW-DJ10-A Cordless Oral Irrigator Review 6

That eject/release button is found on the front of the White control unit.

Lower down on that unit is the slider power button.

3 positions, 0, 1 and 2, you can change the unit from off to low to high pressure.

Only switch the unit on when the attached nozzle has been placed in the mouth, otherwise water will spray everywhere.

The whole unit has an ovalish shape to it and does feel a bit bulky in hand.

Panasonic EW-DJ10-A Cordless Oral Irrigator Review 7

Once you have finished with it, the nozzle fits back into the storage section on the back and the White upper part of the flosser can be pushed back inside the now empty water tank.

This is now compact again for travel, fitting neatly within a backpack, suitcase or other travel bag.

Clever and practical this is.

Panasonic EW-DJ10-A Cordless Oral Irrigator Review 8

Several Waterpik units are designed to be travel friendly, but none collapse in this way. The closest they get to this is the removable nozzle/jet tip.

They don’t then offer a place to store this tip either.

A small travel pouch is then provided normally so that the flossing unit and nozzles can be held together.

It would be nice if the Panasonic came with a pouch to protect it a bit more absorb any excess moisture, but it’s not critical.

Currently ‘the best’ option for those always on the go (travelers and on the road business people come to mind) no other brand to my knowledge thinks about the limited bag space you may have so well.

When it comes to everyday use, it is pretty good too.

It has now won the American Dental Association (ADA) seal of acceptance like Waterpik have, but you don’t need to be a dentist to know when running it is doing something you can feel it on the teeth and gums.  The mouth feels cleaner after use.

Powered by 2 x AA batteries, these fit into the top of the unit.

You need to remove a screw cap that requires a flat head screwdriver or coin to open it.  A bit fiddly, this could be better designed.

Given that you probably need to replace the batteries every couple of months, it’s hardly the biggest issue.

Fill the tank with lukewarm water to commence cleaning.

Panasonic EW-DJ10-A Cordless Oral Irrigator Review 9

The tank holds 5.5oz (160ml) which means up to 40 seconds of usage time.

For many, unless you have nailed your technique this is not enough capacity, so you may want to refill it during your flossing session until you are happy with the clean.

If you have not used a water flosser before, it can take a bit of practice, it’s not the most natural thing to do.

You need to get the technique right, not only to clean the teeth and gums properly but to avoid making a real mess.

Although only a few oz, you need to be leant over a sink to allow the excess water to run from the mouth.

There is no better way to see how best to floss with a water flosser than to watch a demonstration.

Sadly, Panasonic does not have a demo.  However, the video below from Waterpik gives you a good demo, even if the products are different.

How to Use a Waterpik® Water Flosser

There are 2 pressure settings, available, switch between 1 and 2 for a low and high setting.

1 is the slower, softer clean whilst 2 uses the maximum pressure available for an invigorating clean.

Up to 1,400 pulses per minute are produced by the pump per minute to remove plaque and bacteria from the teeth.

Panasonic EW-DJ10-A Cordless Oral Irrigator Review 10

When directed at 90 degrees at the gumline, the pressure will dislodge food and bacteria, including that hidden under the gumline, that you can’t see or always reach.

Just one nozzle comes provided in the box, this when fitted can be rotated a full 360 degrees during use to position the jet of water precisely.

Ridges around the base of the nozzle make it easy for the finger to touch and adjust.

Each nozzle has a working life of approximately 6 months.

A pack of 2 often costs $10, so $5 per tip.

There is no choice of nozzles, no different styles or designs that are suited to different users.

Those with periodontal pockets, braces or implants might find the more diverse range of jet tips from Waterpik to be more suitable.

The whole unit is waterproof so it can be rinsed under a tap and used in the shower if you desire.

Panasonic EW-DJ10-A Cordless Oral Irrigator Review 11

Overall the unit performs well and there is not much to dislike.

Panasonic is not as well known in this space and Waterpik certainly have a more complete offering as well as having achieved the ADA seal of approval.

However, this is the best option if space is at a premium.

Summary of design, usability, clean & general use

  • Cordless
  • Uses 2 x AA batteries
  • 5.5oz/160ml water tank
  • Compact collapsible design
  • 2 power settings
  • 360 degree rotating nozzle
  • Waterproof

Battery life

One of the appeals of this Panasonic water flosser is the fact that it is powered by 2 x AA batteries.

Sadly, none come provided in the box with the unit, but they are fairly cheap and easy to source.

On the top of the unit is where you access the battery compartment.

A screw in cap seals the compartment shut and stops water getting in.

You will need a flat head screwdriver or a coin to insert into the recess to unscrew the cap.  Once released, the 2 batteries can be inserted and the cap screwed back in place.

Panasonic EW-DJ10-A Cordless Oral Irrigator Review 12

It would be nicer if you didn’t need to make use of a coin or screwdriver to undo this.

A completely different design, but Waterpiks Freedom Cordless unit allows for the battery compartment to be easily unlocked and accessed, no tools required, just your fingers.

Once in, a new set of batteries will give roughly 50 minute of usage time.

That is equivalent to 75 days of use, based on 1 user flossing once a day and using a full tank each time.

Different brands of battery can have an impact on the performance as can how often you use the flosser.  Use it twice a day or fill the tank up a couple of times each use, this will increase the frequency of battery replacement.

Some may prefer a built-in battery, but in my experience, the AA option tends to provide longer battery life.

It is possible you could use rechargeable AA batteries in the unit if you desired.

There is no warning when the batteries are low aside from the power of the unit decreasing or stopping.

Therefore you may want to carry a spare set with you.  But, even in more remote locations AA batteries are generally easy to buy.

No option exists to connect this to mains power.

Panasonic EW-DJ10-A Cordless Oral Irrigator Review 13

Summary of battery life

  • Uses user removable AA batteries.
  • Typical usage time of 50 minutes (75 days based on 1 flossing session per day)
  • No battery/charging icon
  • Only know batteries are low when power reduces or unit stops.

Price & where to buy

$34.99 is the typical retail price of the EW-DJ10-A cordless flosser.

A fairly low retail price means that it is not all that common to see a discount or special offer running on this product – we’ve included a live price comparison of retailers stocking it below.

You might be able to save a few dollars if you shop around, but it might be more hassle than the likely savings you will achieve.

Panasonic EW-DJ10-A Cordless Oral Irrigator Review 14

For this price, you will get the unit itself and 1 nozzle.

It will need AA batteries too.

The cost of these do vary, but subject to pack size a fair price is $1 for 2 x AA’s if bought in bulk.

You do need to consider in the price of replacement nozzles/tips.

A pack of 2 costs about $10 and last about 6 months each, so at $5 each they are fairly good value.

Whilst the ED-DJ10-A comes with a 2 year warranty, most products last longer than this.

To give a rough cost guide, here at Electric Teeth, we price products over a 3 year period.

The Panasonic will work out at $75 ($35 + $25 (5 nozzles at $5 each) + $15 (30 x AA batteries) over 3 years or $0.07 per day.

Panasonic EW-DJ10-A Cordless Oral Irrigator Review 15

Compared to regular tape floss at is just 1-2 cents per day this my seem quite expensive, but you are paying for the convenience.

At the time of review, the WF-03 Cordless Freedom version from Waterpik is similarly priced.  Bulkier it might not be the best alternative, but it is American Dental Association approved.

Please note that all prices quoted are approximates and will vary based on location, supplier and time of purchase.  These figures were correct at the time of writing and should not be relied upon as hard fact, but used as a guide during your decision process.

Summary of price & where to buy

  • Recommended retail price of $34.99
  • Replacement nozzles retail for $10 for a pack of 2
  • Daily cost around $0.07 over 3 years
  • WF-03 Freedom Cordless is an alternative worth considering

Reliability & long term use

This is the first Panasonic water flosser I have tested.

A few weeks of hands-on testing has not given any cause for concern in regards to the build quality and reliability.

No specialist tests are performed here at Electric Teeth, we use the products just like you would.

Panasonic EW-DJ10-A Cordless Oral Irrigator Review 16

A few reports from other product owners online have suggested that the unit can get moldy in places and the reliability is a cause for concern.

Unable to make comment on particular cases, the very nature of the product means that some will likely fail and for this there is a 2 year warranty that covers mechanical faults and labor.

To avoid any bacteria of mold buildup, clean the device regularly and thoroughly as described in the provided instructions and keep the unit in a well ventilated area.


The collapsible design has to be the Panasonic’s best feature, making it particularly appealing to those who travel or like to have a flosser with them most of the time.

It does what others of this type fail to do, keep the size small.

2 pressure settings and user removable AA batteries are a bonus too.

Overall performance is good.

Perhaps a little expensive considering the competition and what you get, but not a huge difference in price, there is a sense, of better value from Waterpik in my opinion.

Whilst Panasonic are a household name, their lack of other dental products could be a cause of concern for some.

Ultimately there is little I can fault with the Panasonic, but unless a compact design is really what you need, I would give serious consideration to American Dental Association approved Waterpik for the all round best performance, value and peace of mind.

Our Choice
Waterpik Cordless Water Flosser Rechargeable Portable Oral Irrigator for Travel & Home - Cordless Advanced, Wp-560 White
Waterpik Water Flosser Cordless Dental Oral Irrigator for Teeth with Portable Travel Bag and 3 Jet Tips, Cordless Freedom ADA Accepted, WF-03, White
Panasonic Cordless Dental Water Flosser, Dual-Speed Pulse Oral Irrigator, Collapsible, Design for Travel - EW-DJ10-A
Brush Name
Waterpik WP-560
Waterpik WF-03
Panasonic EW-DJ10-A
Customer Rating
Electric Teeth Rating
Our Choice
Waterpik Cordless Water Flosser Rechargeable Portable Oral Irrigator for Travel & Home - Cordless Advanced, Wp-560 White
Brush Name
Waterpik WP-560
Customer Rating
Electric Teeth Rating
Waterpik Water Flosser Cordless Dental Oral Irrigator for Teeth with Portable Travel Bag and 3 Jet Tips, Cordless Freedom ADA Accepted, WF-03, White
Brush Name
Waterpik WF-03
Customer Rating
Electric Teeth Rating
Panasonic Cordless Dental Water Flosser, Dual-Speed Pulse Oral Irrigator, Collapsible, Design for Travel - EW-DJ10-A
Brush Name
Panasonic EW-DJ10-A
Customer Rating
Electric Teeth Rating

Electric Teeth Rating

Electric Teeth 3 Star Rating


  • How long do the batteries last?
    • Based on 1 use per day you will get about 50 minutes of usage time, which is roughly 75 days of use between battery replacement.
  • Does it come with a charger?
    • No, it is powered by AA batteries.
  • How often do the nozzles need replacing?
    • Nozzles should be replaced every 6 months.
  • Can I use mouthwash in the Panasonic?
    • You could, but it would be expensive and wasteful.  Best adding a dash into the water used in the reservoir for a burst of freshness.
  • How much water or mouthwash does it hold?
    • Approx 5.5oz/160 ml which will last for 40 seconds.
  • Can I use the Waterpik in the shower?
    • Yes, the unit is waterproof and can be used in the shower.
  • Does it come with a travel case?
    • No, a travel case is not provided.  The unit collapses on itself and has a storage space for the nozzle in the back of the unit.
  • My gums bleed when I use cordless flosser. Is that normal?
    • Bleeding gums may be a sign of infection and a little bleeding can be normal when starting a new oral care routine, as you may be cleaning in areas not previously reached. However, if bleeding is excessive or does not stop within a few days of regular use, consult a dental professional.

Your Opinions

Do you own or have you used the Panasonic ED-DJ10-A cordless water flosser?

Are there certain features that you really like or dislike?

Let us know what you think about it, and let others who may well be considering purchasing one know your opinions before they do.

About Jon Love

Jon is a leading voice on electric toothbrushes and has been quoted by mainstream media publications for his opinions and expertise.

Having handled & tested hundreds of products there really is very little he does not know about them.

Passionate about business and helping others, Jon has been involved in various online enterprises since the early 2000s.

After spending 12 years in consumer technology, it was in 2014 that he focused his attention on dental health, having experienced first-hand the challenge of choosing a new toothbrush.

Read More

Leave a comment or question

12 thoughts on “Panasonic EW-DJ10-A Cordless Oral Irrigator Review”

  1. I’ve already given my comment on 24th July 2020, including the solution to prevent the sucking of the upper unit of the flosser into the lower water reservoir when it is in operation. But here’s additional feedback:-
    A frequent problem faced by reviewers on Amazon, and which I too experienced, is the frequent erratic “on again, off again” functioning of the flosser. You have to shake it or tap on its body to get it working. My theory – and it works for me – is that the flosser operates on a micro centrifugal pump. If you Google the working of a conventional centrifugal pump you will see that to get it started you need to first “prime” it. That is, fill the housing of the pump with water which also drives out the air. “Dry” running of the pump doesn’t build up the energy or suction power to pump up the water. It also vibrates the parts of the pump and damages it. It is only when the air is evacuated from the pump that it can start functioning.
    What I do is to fill up the flosser reservoir with water, close the inlet cap, hold the flosser vertical, and suck on the nozzle tip till I get water in my mouth(nothing icky about it. After all the nozzle is always in your mouth when you are using the flosser!) With this the housing of the pump is filled with water and the air in it removed, that is, it is “primed.” My flosser has worked unfailingly with this procedure. When you finish with your flossing, completely empty out the reservoir through the inlet opening, and again suck on the nozzle and completely drain out the pump housing of the residual water in it(following the manual instruction of turning on the switch to do so entails running it “dry” which will damage the pump).
    This is my empirical finding, and I can’t claim it to be the definitive word on the subject!

  2. I’ve just acquired one, and it worked like a charm. Except for one irritating defect: as you switch on the gizmo and start using it the upper irrigation section gets progressively sucked into the lower water tank. I knew immediately that it was because of the vacuum created in the airtight reservoir as the water was being pumped out of it. The differential air pressure was pushing the irrigator down into the tank.
    I was wondering whether anyone else had noticed this, and searched in the reviews for the item in Amazon.com. And there was this Mr John Allred who had the same experience, and had come up with a brilliant but simple solution to overcome this problem: drill a small(1/8 inch) hole on the upper part of the water tank, just below where the base of the irrigator ends when it is in the pulled up locked position. This equalizes the air pressure by releasing the vacuum and the balance is maintained. (Note: the hole should be drilled on the side of the tank where the water inlet is situated, and not on the reverse side).
    Now after carrying out the minor surgery on my acquisition I have no problem with it.
    I suggest that you access John Allred’s review in Amazon.com as apart from explaining his brilliant technique he has even illustrated it with a photograph.

    • Thanks for the feedback and reference to the idea to relive the pressure. Sounds an ingenious solution to a problem that you and select others have experienced. I do wonder what Panasonic might have said had you contacted them about this issue?

      • There’s no easy way one can get in touch with the manufacturer, M/s Panasonic. I’ve registered my flosser on their website, but when I tried to give my feedback I found it to be impossible. I was only hoping that someone from the multinational would be periodically scanning the online reviews in Amazon and sites like yours!

  3. My Panasonic water pick s not working. I put new batteries and the water is not coming out from the pick. What should I do? Is it already broken?

    • Hi Bernadette.

      Sorry to hear you are having problems with your flosser.

      When you power it on, is there any noise from the unit? Does it sound like it is trying to draw the water through, but with no luck?

      If it doesn’t sound like it is working at all, try replacing/repositioning the batteries/making sure they are positioned correctly.

      Make sure the unit is pulled out correctly. If the unit is not extended correctly, this can stop it working. Also, consider the angle of the unit, keep it more upright to ensure it functions correctly.

      You can try replacing the nozzle as it may well be damaged or blocked so no water is coming through.

      If none of this works, you may need to speak to Panasonic.

    • I know it’s pretty late in the day, but if you still have the flosser please see my feedback dated 2nd April 2021. It might just bring it back to life! Even otherwise you could try it out with any other flosser that you might acquire.

  4. Good review. Have owned panasonic for awhile. Trying to figure out a better way to clean it. Gets a little grimy on out side behind blue cover. Was wondering how to take it apart. Don’t see an easy way

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