Mono Bluetooth Headset: Key specifications: 1.Bluetooth specification: V3.0+EDR 2.Bluetooth profiles: HSP, HFP, A2DP 3.Operating distance: 10 meters Class II 4.Rechargeable 70 mAH Li-polymer battery 5.Talk time: Up to 4 hours 6.Music playing time: Up to 3.5 hours 7.Charging time: About 1.5 hours 8.Multipoint-function Special features: 1.In-ear type with confortable earplug, easy to take with you. 2.Easy controls for mute, call transfer, voice dial and call answer/end/reject. 3.Support remote control of play/pause, volume up and volume down. 4.Automatically connect to the last connected Bluetooth device. 5.Micro USB connector charging via AC charger or computer USB port. 6.Micro 5 pin jack allows headset to work without battery, universal usb charging port