Bluetooth Headphone 1,Portable bluetooth headset 2,Colorful bluetooth headset 3,Fashionable and Light weight OEM&ODM Blue Calling Time:4 hoursHolding Time:120 hoursOutside Size: 41*18*12mmWorking Area: 3-10 MetersWeight: 12gBattery: polymer Lithium cellSupporting Bluetooth Agreement V2.0Color:Black Bluetooth Headphone