M81 WIRELESS NOISE CANCELLING HEADPHONE

Bluetooth: 5.4
Working Range: 10mSpeaker Diameter: 40 mm
Sensitivity:102+3dB
FrequencyResponse:20HZ-20KHZ
Impedance:32 ohm
Battery Voltage: 3.7V
Battery Capacity: 600 mAh
Charging Time: = 2 H
Working Time: = 40 H