Specification:
Color: black / white (optional)
Appearance material: plastic
Bluetooth version: 4.1
Bluetooth distance: 10 meters (open)
Support language: Chinese, English (standby double-click multi-function keys)
Key function: pause / play, previous song, next song, volume addition and subtraction, camera (support part of the phone), tail number redial
Headphone battery: 4.2V 50mAh lithium battery (built-in)
Talk time: 3.5h
Standby time: about 100h
Charging time: about 2h
Operating temperature: -40-80 ℃
Charging interface: USB 2.0
Product Interface: Mirco USB
Product size: 4.9 x 1.4 x 2.3cm

Packing List:
1 x headset (with battery)
1 x Chinese and English manual
1 x USB charging cable