Bluetooth Heaphones with Mic H70BTORG BLUETOOTH STEREO HEADPHONES WITH MICROPHONE. BUILT-IN RECHARGEABLE BATTERY Bluetooth V2.1 + EDR Bluetooth protocol: HSP/Hfp/A2dp/Avrcp. Range 40 Feet Calling: 11 Hours. Mini-USB to USB to charge headset Listening to Music: 10 Hours. Standby Time: 250 Hours