Take open-ear listening to new depths with Xtrainerz wireless MP3 headphones. With 4GB of built-in storage, you can take up to 1,200 tracks with you in and out of the water while you’re cross-training toward your new PR. Enjoy 8 hours of listening to premium audio with full track and volume control at the touch of a button. Leave your device behind and embrace the simplicity of your favourite tracks paired with your favourite adventures. (Not Bluetooth compatible)