Mpow Seashell V4.1 Bluetooth Headphones, Wireless Sport Earbuds with Mic, APTX, CVC 6.0 Noise Cancellation, Sweatproof Earphones for Running, Gym, Workout Excellent Noise Cancellation : The 6th generation CVC technology reduces outside noises and enables clearer sound from microphone. Bluetooth 4.1 & aptX : Bluetooth 4.1 chip with aptX technology, Mpow Seashell offers you great listening experience. IPX4 Waterproof Level : The certified IPX4 ensures that Mpow Seashell can protect itself from any drop or splash of water. Perfect for sports! Great Battery Performance : The built-in battery of Mpow Seashell allows up to 7-hour playing/talking time and 185-hour standby. Wide Compatibility : According to the test, Mpow Seashell is compatible with most Bluetooth-enabled smart phones.