MECO(TM) New HBS-740 Wireless Bluetooth Universal Stereo Headset for iPhone Samsung LG Tone Music time: UP to 10 hours 8.Standby time: UP to 15 Days Good waterproof design, whether it's in the rain or sweat when motion, completely don't have to worry about water damage. Bluetooth specification: CSR4.0 scheme, BC8635 chip. Package Content: 1 x Wireless Stereo Headset, 1 x Charging Cable