The H2O Audio TRI Multi-Sport Waterproof Bone Conduction Headphones, Bluetooth Open Ear Headphones with Built-In MP3 Player -up to 6-Hour Battery Life, 8 GB -For Swimming, Running, Cycling, Hiking.

Open Ear Experience: Our latest bone conduction speakers are slimmer (by 5mm vs. TRI headphones) and use enhanced speakers that provide an amazing sound in and out of water - with full situational awareness.

Multi-Sport Design: Designed for swimming, biking, running, paddling, surfing, snowboarding. Your Sport - Your Music!

100% Waterproof: H2O Audio waterproof technology allows headphones to withstand submersion to 12'/3.6m underwater for an unlimited amount of time. Waterproof Rating: IPX8.

MP3 Player: Built-in MP3 player with 8 GB of memory will hold several thousands of songs and accepts most music formats - including the iTunes .M4A.

Bluetooth: Connect your iPhone, Android or any music enabled smart watch - and enjoy running & biking with streaming music. Note Bluetooth range under water is only few inches. 

Battery Life: 6 Hours of play time should cover most endurance events. Battery life will vary based on use. Charging time ~2h.

Secure Fit: The neck band provides a secure and comfortable fit while swimming, paddling, running, and working out. Earplugs included for swimming use - to reduce any water noise in your ears.

Other Specs: Dimensions: H45mm, D140ｍｍ, Weight 33g. Frequency range: 20Hz～20kHz, Battery specifications: Li-Ion 3.7V, 270mAh, 0.99Wh, Work environment: 0~50C