Oback(TM) Wireless Sports Stereo Sweatproof Bluetooth Earphone Headphone Earbuds Headset (Green) Comfortable and secure design fits perfectly to your ear; the cable smartly stays out of your way when running, jogging or exercising Bluetooth Headset & Hands-free, A2DP, AVRCP and can connect two phones (one torr two). Latest Bluetooth 4.0 technology with up to 5 hours of continuous talking / music time; easy and fast pairing with smartphones, tablets and other Bluetooth enabled music devices. Can connect to two devices at the same time. Adjust volume and switch songs freely. Support: A2DP/AVRCP Talk time: 4-5 hours Play music: 3-4 hours