Syllable D900 Wireless Bluetooth 4.0 Earbuds Headphone Sports Headset Earphones with Charging Stand for Android/IOS Smart Phone/Ipad/Ipod/PC/Tablet/Laptop (Black) HiFi acoustic effect, enjoys crisp clear music entertainment With low power reminder design, lets you keep informed of the battery status Noise-free microphone for clear conversation IPX4 waterproof, sweat will not leak into the inner construction