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By certification 
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
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
