Speaker: 40 mm

Noise reduction frequency: 20-700Hz

Noise reduction depth: 23+/-3dB

Noise reduction IC: LTK8002D

Frequency: 20-20KHz

Bluetooth solution: JL 5.1

Working distance: about 10 meters

400mAh rechargeable battery

Charging method: micro USB

Charging time: about 2 hours

Using time: about 8 hours (about 15 hours with noise reduction off)

Function: Bluetooth call, volume adjustment, next and last song song 

Color box packaging (including audio cable)