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FINIS Duo - Underwater MP3 Player - Waterproof Bone Conduction Swimming Headphones for the Pool - Great Addition to Pool and Swimming Accessories - Supports MP3 and WMA files

3.7 3.7 out of 5 stars 2,302 ratings

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About this item

  • Underwater MP3 Player: Enjoy crystal clear audio during your swim workout with the FINIS Duo MP3 player, the ultimate underwater headphones for swimming
  • Bone Conduction Headphones: The Duo utilizes Bone Conduction audio transmission to deliver sound through cheekbones for the best swimming headphones experience
  • Underwater Swimming Headphones: Navigate your audio files with ease with the Duo's simplified interface; Duo supports MP3 and WMA files
  • Waterproof Bone Conduction Headphones: With 4GB of flash memory and a rechargeable battery life of up to 7 hours, the FINIS Duo MP3 player stores up to 1000 songs or 60 hours of playback
  • Duo takes 3 hours to charge from low to full. Play time is up to 7 hours, depending on settings and volume level. To charge: locate the gold connectors on the back of the speaker. Align the connectors with the pins on the USB magnetic dock
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Important information

Safety Information

This product can expose you to chemicals including Lithium Ion, which is known to the State of California to cause birth defects or other reproductive harm.

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FINIS Duo Underwater Music MP3 Player with Bone Conduction Audio
FINIS Duo Underwater Music MP3 Player with Bone Conduction Audio
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Price$108.18$59.95$59.99$59.95$79.99$279.99
Delivery
Get it as soon as Tuesday, Apr 2
Get it as soon as Tuesday, Apr 2
Get it as soon as Tuesday, Apr 2
Get it as soon as Tuesday, Apr 2
Get it as soon as Tuesday, Apr 2
Get it as soon as Tuesday, Apr 2
Customer Ratings
Sound quality
3.8
4.2
4.0
4.2
4.1
4.1
Battery life
3.7
4.2
4.2
4.2
4.2
Easy to use
3.6
4.2
4.1
4.2
For working out
4.3
4.0
4.3
Value for money
4.0
4.2
4.0
Sold By
Pattern Professional
SEWOBYE
Tayogo
SEWOBYE
Underwater Audio
theiPodStore
memory capacity
4096 MB
8 GB
8 GB
8 GB
8 GB
160 GB
supported standards
MP3
MP3
MP3,WMA,OGG,APE,FLAC,WAV,AAC-LC,m4a formats
AAC, WMA, MP3
MP3
MP4, MP3
connectivity tech
Wired
USB
USB
USB
USB
Aux
media type
Micro SDXC
Micro SDXC
Flash
MP3
model name
FINIS Duo™ Underwater Bone Conduction MP3 Player
W16
SYRYN Swimbuds Flip Bundle
ipod classic
component type
Battery
Memory
Memory
Memory, Battery
Memory
Playback Controls

From the manufacturer

Duo Usage Photo
Duo Usage Photo

Product Description

The Duo is an MP3 player designed for swimmers that offers the highest quality sound without the use of ear buds. The Duo utilizes a sleek, two-piece design and Bone Conduction audio transmission to deliver crystal clear audio through cheekbones to the inner ear. An integrated clip design secures the Duo to goggle straps to rest on the cheekbones for a comfortable and streamlined fit. A simplified interface offers four buttons to easily navigate between songs, podcasts, audiobooks and other supported audio files. The Duo supports unprotected MP3 and WMA files. The included USB magnetic dock allows for universal data transfers and charging. The device offers 4GB of flash memory and a Lithium-Ion rechargeable battery life of up to 7 hours.

Features and Benefits

Bone Conduction Audio Transmission

Amazingly clear sound in the water without the use of ear buds.

Supports MP3 and WMA Audio Formats

Compatible with iTunes; listen to music, audiobooks, podcasts and more.

4GB of Storage

Stores approximately up to 1000 songs or 60 hours of playback.

Integrated Clip Design

Secures the device to goggle straps to rest on the cheekbones for a comfortable and streamlined fit.

Rechargeable Lithium-Ion Battery

Up to 7 hours of battery life.

Waterproof IPX8

Sound is clearest when submerged in water.

Gold-Plated Connection Pins

Universal auxiliary USB Cable allows for quick uploading and charging while also preventing corrosion in the water.

Internationally Patented

USA – 7.310.427 B2

Europe – 03766986.8

Australia – 2003257031

What's in the box

  • FINIS Duo™ Underwater Bone Conduction MP3 Player
  • Looking for specific info?

    Product information

    Warranty & Support

    Product Warranty: For warranty information about this product, please click here. [PDF ]

    Feedback

    FINIS

    FINIS Duo Underwater Music MP3 Player with Bone Conduction Audio


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    Product Description

    The FINIS Duo Underwater Bone Conduction MP3 Player offers the swimmer crystal clear sound underwater without the use of ear buds by transmitting the audio through cheekbones to the inner ear. The MP3 player can hold up to 1000 songs or 60 hours of playback with 4GB of storage. The design of the MP3 player allows you to secure the device to goggle straps to rest on the cheekbones for a comfortable and streamlined fit. Compatible with iTunes this player allows you to listen to music, audiobooks, podcasts, and more. A rechargeable lithium-ion battery holds up to 7 hours of life. This device is tested to perform at a depth of 3 meters (10 feet) for 30 minutes; if immersion at 3 meters (10 feet), or deeper, occurs for longer than 30 minutes, damage may occur. Newly engineered version of the device features a stronger magnetic connection to prevent complications with device recognition or charging. A simplified interface offers four buttons to easily navigate, and the included USB magnetic dock allows for universal data transfers and charging.

    Customer reviews

    3.7 out of 5 stars
    3.7 out of 5
    2,302 global ratings

    Customers say

    Customers like the speed and sound quality of the mp3 player. For example, they say it makes swimming much more enjoyable and the sound conduction under water is flawless. That said, some complain about the battery life and value. They say it stopped charging after a few months of use and that it's not worth the money. Customers also dislike the music compatibility. Opinions are mixed on performance, ease of use, and quality.

    AI-generated from the text of customer reviews

    305 customers mention219 positive86 negative

    Customers like the sound quality of the mp3 player. For example, they mention the sound is superior over any of the in-ear mp 3 players, the volume is good, and the music comes out clear. The water actually amplifies the sound, and it's excellent under water.

    "...The sound is fine for rock music, and my ability to decipher the words is no worse than a car radio, but it is way more enjoyable than counting..." Read more

    "...The music sounds great underwater, and they were worth every penny. I wholeheartedly recommend you buy them and you will enjoy them...." Read more

    "I have used this a few months now. The sound is really good underwater, less so just out of the water so I recommend buy it for the purpose of..." Read more

    "...The sound quality is pretty good although it lacks clarity in bass...." Read more

    125 customers mention114 positive11 negative

    Customers find the speed of the mp3 player to be great. They say it makes swimming much more enjoyable and the controls make it easy to navigate songs while swimming. They also say it improves their swim workout experience and doubles their swimming time.

    "...Yes. But it's amazing to be able to swim laps with MUSIC!..." Read more

    "...some of these items seem clunky they are still the best most suitable listening devices I have found...." Read more

    "...The duo has improved my swim workout experience so much I've decided to purchase a backup in case mine fails...." Read more

    "This is a really solid upgrade from the Neptune and a great way to pass the laps...." Read more

    289 customers mention139 positive150 negative

    Customers are mixed about the performance of the mp3 player. Some mention that the method that the finis uses works surprisingly well, and the unit is still functioning well. They say it works just like a thumb drive and has not encountered any problems. However, others say that it simply stopped working, and that the button to turn them on/off just doesn't respond.

    "...It turned on and off well. It plays well... now if it will do all that while I swim. :D..." Read more

    "...As for their rubbing alcohol method with a qtip- tried it- does not work...." Read more

    "...Bone conduction: These definitely are bone conducting and work great underwater, BUT, at the volume level that lets me hear comfortably, they are..." Read more

    "...The biggest problem with the Duo is the docking mechanism. It just doesn't work. It's a good idea, but it was not functional...." Read more

    205 customers mention81 positive124 negative

    Customers are mixed about the quality of the mp3 player. Some mention that they are fantastic and better than comparable-type products. However, others say that they received defective headphones that broke very quickly after starting use.

    "...Also, I had to convert a lot of songs to MP3, some would not convert at all, which was disappointing...." Read more

    "...The sound is definitely the best when underwater and there, it's really good...." Read more

    "...The one flaw with the Neptune is the clunky player that has to be attached to the goggle strap. I was excited to see that the Duo got rid of this...." Read more

    "...All in all, these headphones are fantastic and really make my time in the pool so much more enjoyable!" Read more

    112 customers mention75 positive37 negative

    Customers are mixed about the ease of use of the mp3 player. Some mention that the controls are simple and easy to manage, while others say that it takes a bit to get used to.

    "...best swimming headphones I've used as far as sound quality and just ease of use...." Read more

    "...It was super-easy to connect to my Mac and drag and drop songs onto it and the instructions even gave clear, easy info on how to convert any song..." Read more

    "...Cons - setup is archiac. I spent some time creating playlist from Apple, and they can't be downloaded as a playlist, only individually...." Read more

    "...to hook them onto your goggle straps and your goggles are very easy to put on after that...." Read more

    178 customers mention41 positive137 negative

    Customers are dissatisfied with the battery life of the mp3 player. They mention that it stopped charging after a few months of use, it doesn't hold a charge, and it needs to be reset. Some say that the device only lasts 1.5 hours on a full charge and that the battery does go down quicker.

    "...7.5.17 - I am back for an update. Again it won't hold a charge, either that or the on off button don't work. I again can't get it to play...." Read more

    "...For the people who said the device does not hold a charge, I wonder if they followed the instructions to charge for 24 hours before first use?..." Read more

    "...YAY! Also, it's magnetic so a small bump can stop charging or eject it from your computer...." Read more

    "...wearing these while swimming laps, and I think they do help me to swim longer.Cons - setup is archiac...." Read more

    75 customers mention19 positive56 negative

    Customers are dissatisfied with the value of the mp3 player. They mention that it is not worth the money, has poor execution, and is not compatible with their iTunes or Apple collection of songs.

    "...This only loses one star for the price. It doesn't need to be as expensive as it is." Read more

    "...NOT worth the price." Read more

    "...So, all in all, these are great as headphones and are pretty affordable compared to other models...." Read more

    "...connecting the two ear pieces frayed, shorting out the unit, and making it useless...." Read more

    53 customers mention5 positive48 negative

    Customers are dissatisfied with the music compatibility of the mp3 player. They mention that it doesn't play some recorded songs, it's very hard to put music on it from iTunes, and it'll only load one song. Customers also say that the product is not compatible with listening to recorded books.

    "...saying that the computer does not recognize the device or that songs won't play, I suspect the song problem lies in the encoding, and device..." Read more

    "...The only limitation is that it’s an MP3, not an MP4 player, but outside of that, they charge easily, I can swim for four separate swims of an hour..." Read more

    "...There is a hesitation before music starts...." Read more

    "...instead of playing through the list completely, ie it repeats a few songs all the time and ignores the rest...." Read more

    Good rock music sound while swimming with silicone earplugs
    5 Stars
    Good rock music sound while swimming with silicone earplugs
    [Edit Oct 2022 after owning 18 months: After charging the unit yesterday, I discovered that the little green square cover on the charging plate had been lost, leaving a glob of glue, exposing the metal plate. Quick response from customer service: it will now leak and be ruined, and the one year warranty is gone. I was offered a discount on a new one. Disappointing, but I suppose 1 1/2 years in the water is an acceptable life for this fun device. I do not know if it is the amount of use or merely the age, but a glued-on part, whether merely left in storage or rubbing against my head and in water cannot be expected to last indefinitely. For now, I plan to either move the loose cosmetic tab from the other side over the charging plate (but what kind of glue to use?), or put a little piece of duct tape over it. That could give it an extended life, I suppose. Also, re my note below where I discussed the advice about cleaning the contacts, I never encountered any build-up on the contacts, so I did not need the calcium remover chemical; furthermore, given the apparent fragility of the glued-on part, I suspect exposing that to any unnecessary chemical attack may not be wise.]I have had my waterproof Finis Duo MP3 player for 5 months, swimming laps in pool 4x/week, and I like it. I have very little previous experience with other listening devices, but I wanted something for this purpose that would allow me to keep water out of my ears. The sound is fine for rock music, and my ability to decipher the words is no worse than a car radio, but it is way more enjoyable than counting strokes to myself.The sound bypasses the ear canal, eardrum and ossicles through bone conduction directly to the cochlea. I wear multi-use disposable silicone earplugs (CVS). Without them, the sound will not be as clear.Bluetooth apparently does not work through water, so you load the MP3 music files onto the unit’s memory directly from your computer, and can delete and/or add anytime (4GB of flash memory). I haven’t used iTunes for this, but one may need to convert iTunes music to MP3. The files I loaded onto my Duo were already MP3 files. I can only guess an MP3 book file would work, too, since I just read that those files are about 280MB for 10 hours; however, I don’t know what I would do if I missed an important sentence and had to go back.Finis company was very good at answering some questions I had via email. I got some tips from reading other reviews, too.You should charge the lithium-ion battery for 24 hours before first use—maybe it won’t hold a charge if you fail to do this the first time.You can charge on a fast charger on wall safely, but don’t store the Duo unit itself on the charger. Battery life claimed of up to 7 hours, though I cannot attest to that. I chart mine every 2 or 3 uses (half hour swims).It took me awhile to memorize the buttons and their use. I’m still unsure when the toggle at bottom is on random play or not, or whether that resets after turning the unit off. I also have another question for the company: Even though I turn it off before connecting to charging, why has it started playing recently when the charging finishes?I suggest looping just one of the 2 straps of your goggles to the unit if your goggles have an overlap in the front. I had to fiddle with this carefully for several weeks before deciding the best connection to avoid the device from lifting goggles off my eyes, while allowing the speakers to fit just in front of the ear over the zygoma, a.k.a. cheekbone. You may prefer to have yours on the insider strap loop, rather than the way I currently have mine (photo).Once I figured this out, I leave the unit attached to my goggles permanently to avoid breaking the clips.I noted a previous review suggested using CLR- calcium, lime and rust remover instead of alcohol, so I bought some, but have not needed it yet. Six hours at full strength as reviewer suggested may be excessive, because it took some of the finish off a faucet I tried it on. Bottle instructions say far less time and at half strength.
    Thank you for your feedback
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    Top reviews from the United States

    Reviewed in the United States on September 1, 2021
    Color: Black/Acid GreenVerified Purchase
    Customer image
    RTK
    5.0 out of 5 stars Good rock music sound while swimming with silicone earplugs
    Reviewed in the United States on September 1, 2021
    [Edit Oct 2022 after owning 18 months: After charging the unit yesterday, I discovered that the little green square cover on the charging plate had been lost, leaving a glob of glue, exposing the metal plate. Quick response from customer service: it will now leak and be ruined, and the one year warranty is gone. I was offered a discount on a new one. Disappointing, but I suppose 1 1/2 years in the water is an acceptable life for this fun device. I do not know if it is the amount of use or merely the age, but a glued-on part, whether merely left in storage or rubbing against my head and in water cannot be expected to last indefinitely. For now, I plan to either move the loose cosmetic tab from the other side over the charging plate (but what kind of glue to use?), or put a little piece of duct tape over it. That could give it an extended life, I suppose. Also, re my note below where I discussed the advice about cleaning the contacts, I never encountered any build-up on the contacts, so I did not need the calcium remover chemical; furthermore, given the apparent fragility of the glued-on part, I suspect exposing that to any unnecessary chemical attack may not be wise.]

    I have had my waterproof Finis Duo MP3 player for 5 months, swimming laps in pool 4x/week, and I like it. I have very little previous experience with other listening devices, but I wanted something for this purpose that would allow me to keep water out of my ears. The sound is fine for rock music, and my ability to decipher the words is no worse than a car radio, but it is way more enjoyable than counting strokes to myself.
    The sound bypasses the ear canal, eardrum and ossicles through bone conduction directly to the cochlea. I wear multi-use disposable silicone earplugs (CVS). Without them, the sound will not be as clear.
    Bluetooth apparently does not work through water, so you load the MP3 music files onto the unit’s memory directly from your computer, and can delete and/or add anytime (4GB of flash memory). I haven’t used iTunes for this, but one may need to convert iTunes music to MP3. The files I loaded onto my Duo were already MP3 files. I can only guess an MP3 book file would work, too, since I just read that those files are about 280MB for 10 hours; however, I don’t know what I would do if I missed an important sentence and had to go back.
    Finis company was very good at answering some questions I had via email. I got some tips from reading other reviews, too.
    You should charge the lithium-ion battery for 24 hours before first use—maybe it won’t hold a charge if you fail to do this the first time.
    You can charge on a fast charger on wall safely, but don’t store the Duo unit itself on the charger. Battery life claimed of up to 7 hours, though I cannot attest to that. I chart mine every 2 or 3 uses (half hour swims).
    It took me awhile to memorize the buttons and their use. I’m still unsure when the toggle at bottom is on random play or not, or whether that resets after turning the unit off. I also have another question for the company: Even though I turn it off before connecting to charging, why has it started playing recently when the charging finishes?
    I suggest looping just one of the 2 straps of your goggles to the unit if your goggles have an overlap in the front. I had to fiddle with this carefully for several weeks before deciding the best connection to avoid the device from lifting goggles off my eyes, while allowing the speakers to fit just in front of the ear over the zygoma, a.k.a. cheekbone. You may prefer to have yours on the insider strap loop, rather than the way I currently have mine (photo).
    Once I figured this out, I leave the unit attached to my goggles permanently to avoid breaking the clips.
    I noted a previous review suggested using CLR- calcium, lime and rust remover instead of alcohol, so I bought some, but have not needed it yet. Six hours at full strength as reviewer suggested may be excessive, because it took some of the finish off a faucet I tried it on. Bottle instructions say far less time and at half strength.
    Images in this review
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    Customer image
    16 people found this helpful
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    Reviewed in the United States on December 17, 2016
    Color: Black/Acid GreenVerified Purchase
    83 people found this helpful
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    Reviewed in the United States on November 6, 2023
    Color: Black/Acid GreenVerified Purchase

    Top reviews from other countries

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    Kay G.
    5.0 out of 5 stars A fantastic swimming solution!
    Reviewed in Canada on August 14, 2021
    Color: Black/Acid GreenVerified Purchase
    5 people found this helpful
    Report
    Marco
    5.0 out of 5 stars Ancora perfetto
    Reviewed in Italy on June 22, 2023
    Color: Black/Acid GreenVerified Purchase
    One person found this helpful
    Report
    Sanjuana Sampayo
    5.0 out of 5 stars Excelente sonido al nadar
    Reviewed in Mexico on August 10, 2018
    Color: Black/Acid GreenVerified Purchase
    One person found this helpful
    Report
    Loïc S.
    5.0 out of 5 stars Super son sous l'eau !
    Reviewed in France on August 25, 2019
    Color: Black/Acid GreenVerified Purchase
    One person found this helpful
    Report
    Amazon Customer
    5.0 out of 5 stars Huge fan!
    Reviewed in Singapore on January 20, 2024
    Color: Black/Acid GreenVerified Purchase