【Truly Waterproof & Sweatproof Technology】Ultrasonic seamless bonding process impervious and leakproof.IPX7 waterproof rating, not only is the headset capable of being submerged underwater of 3 ft, it can endure intense workouts and training. You'll have the peace of mind knowing that your headset can withstand heavy sweat while running or exercising for long periods of time. The perfect companion for any athlete, trainer or runner. 【High Quality Sound】9 mm titanium diaphragm speaker unit,make each earbud contains a premium audio driver delivering powerful highs, crystal clear mids and powerful bass. 【Extreme Comfort】 Gentle over-ear hooks and softened silicone eartips float effortlessly in place as you sprint, lift, and push your way to the limit.You can also switch between MP3 mode to be able to play audio from the built-in memory, as well as communicate straight from the headset with the built-in microphone, allowing you to answer or hang up calls. 【Built-In 8GB MP3 player】The Waterproof sports headphones has 8GB of built-in memory to be able to upload 1500 music. TIn running, gym training, water sports, bathing, it is not convenient to carry a mobile phone, use a waterproof MP3 player, you can still hear beautiful songs.The only supported media formats are APE, WMA, MP3, FLAC & WAV. All other formats are incompatible. (41)