---
product_id: 20454720
title: "FINIS Duo Underwater MP3 Player - Bone Conduction Swim Headphones - Waterproof Audio - 4GB - MP3/WMA Compatible - 7 Hr"
brand: "finis"
price: "A$137"
currency: AUD
in_stock: true
url: https://www.desertcart.com.au/products/20454720-finis-duo-underwater-mp3-player-bone-conduction-swim-headphones-waterproof
store_origin: AU
region: Australia
---

# 100% waterproof for swim use 4GB storage for 1000+ songs 7-hour rechargeable battery life FINIS Duo Underwater MP3 Player - Bone Conduction Swim Headphones - Waterproof Audio - 4GB - MP3/WMA Compatible - 7 Hr

**Brand:** finis
**Price:** A$137
**Availability:** ✅ In Stock

## Summary

> 🌊 Dive Deep, Swim Loud: The Soundtrack Your Swim Deserves

## Quick Answers

- **What is this?** FINIS Duo Underwater MP3 Player - Bone Conduction Swim Headphones - Waterproof Audio - 4GB - MP3/WMA Compatible - 7 Hr by finis
- **How much does it cost?** A$137 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/20454720-finis-duo-underwater-mp3-player-bone-conduction-swim-headphones-waterproof)

## Best For

- finis enthusiasts

## Why This Product

- Trusted finis brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Long-Lasting Power:** Rechargeable battery delivers up to 7 hours of uninterrupted audio, powering your entire workout.
- • **Effortless Navigation:** Simplified interface designed for quick, splash-proof control even mid-lap.
- • **Swim-Proof Durability:** Fully waterproof design built to withstand your toughest pool sessions and open water swims.
- • **Crystal-Clear Underwater Audio:** Experience premium bone conduction sound that cuts through water for flawless swim motivation.
- • **Massive Music Library On-The-Go:** Store up to 1000 tracks or 60 hours of playback with 4GB flash memory—never run out of swim jams.

## Overview

The FINIS Duo is a cutting-edge underwater MP3 player featuring bone conduction technology for crystal-clear audio through your cheekbones. With 4GB of storage, it holds up to 1000 songs and supports MP3/WMA formats. Fully waterproof and designed for swimmers, it offers a 7-hour rechargeable battery life and a user-friendly interface optimized for underwater use.

## Description

FINIS Duo Underwater MP3 Player - Bone Conduction Swim Headphones - Waterproof Audio - 4GB - MP3/WMA Compatible - 7 Hr

## Features

- 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 high-quality 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
- About FINIS: Our mission is to simplify swimming through innovation, high-quality products, and a commitment to education

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Compatible Devices | Laptop |
| Supported Media Type | Micro SDXC |
| Supported Standards | MP3 |
| Battery Average Life | 7 Hours |
| Memory Storage Capacity | 4096 MB |
| Screen Size | 1.77 |
| Additional Features | Waterproof |
| Connectivity Technology | Wired |
| Item Dimensions D x W x H | 2.36"D x 5.91"W x 8.66"H |
| Item Weight | 5.28 ounces |
| Color | Black/Acid Green |

## Product Details

- **Brand:** FINIS
- **Model Name:** FINIS Duo™ Underwater Bone Conduction MP3 Player
- **Special Feature:** Waterproof
- **Connectivity Technology:** Wired
- **Memory Storage Capacity:** 4096 MB
- **Color:** Black/Acid Green
- **Screen Size:** 1.77
- **Compatible Devices:** Laptop
- **Media Type:** Micro SDXC
- **Included Components:** FINIS Duo™ Underwater Bone Conduction MP3 Player

## Images

![FINIS Duo Underwater MP3 Player - Bone Conduction Swim Headphones - Waterproof Audio - 4GB - MP3/WMA Compatible - 7 Hr - Image 1](https://m.media-amazon.com/images/I/716AwzeBkOL.jpg)

## Available Options

This product comes in different **Color** options.

## Questions & Answers

**Q: How do i know if this is the latest, greatest version available?  i know finis has updated it because older models had issues.**
A: The short answer is this one is the latest version.  Saying that I prefer the previous version (LED screen which allowed with to look at song titles/order, better volume control, smaller speakers attached to your goggles etc...)  design much better.  Saying that, I had 2 of them and both only lasted about 1 year.  Hopefully, this design will be better.

**Q: how do I ensure that random is not switched on? I listen to audio books and am struggling to keep it playing in order.**
A: My songs play in the order in which they were loaded....alphabetical.  I know my playlist ahead of time so I can keep track of my time without having to count laps.  I'm always afraid that I'll do something to put it in random mode, but so far, so good.  I think that you can probably look it up online.

**Q: How does the duo compare to the Neptune. Neptune stops taking a charge after a couple of months use. Thanx.**
A: I had 2 neptunes and they both broke in about 1 year.  I liked the design of the neptune much better but hope this new design lasts at least a couple of years (I have a blue/white generation 1 swimp3 that still works).

**Q: Do you think they would work clipped on to sunglasses if I wanted to use them out of the water?**
A: The short answer is yes.  But they work much better under the water.  They  are not ear buds.  I use them while I'm in the water but the sound is much fuller under water.

## Frequently Bought Together

- 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
- Speedo Unisex Ear Plugs for Swimming Waterproof Reusable Training
- Aegend Swim Goggles, Swimming Goggles No Leaking Full Protection Adult Men Women Youth

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**Shop now:** [https://www.desertcart.com.au/products/20454720-finis-duo-underwater-mp3-player-bone-conduction-swim-headphones-waterproof](https://www.desertcart.com.au/products/20454720-finis-duo-underwater-mp3-player-bone-conduction-swim-headphones-waterproof)

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-01-26*