Koramzi Wireless Bluetooth Sport Earbuds Light weight Noise Cancelling Headphone With Mic And Volume Control Compatible With Any Bluetooth Enabled Devices, Bluetooth 4.0 Crystal Clear Sports Earphones, Uses Bluetooth 4.0 connectivity with signal enhance technology, so audio is rich and clear Long Battery Life, These wireless earphones keep going as long as you do with 4-6 hours of talk and listening time and up to 150 hours of standby Ergonomic Design, Ensures a comfortable fit with no slippage and makes the controls incredibly easy to access Ideal for Sports, running &Gym, hiking, exercise,cycling, jogging- Sweatproof Bluetooth Earbuds Designed for extreme movement while delivering true sound performance