Bluetooth version: Bluetooth V 5.0
Bluetooth protocol: A2DP, AVRCP, HFP
Effective distance: 10m
Endurance: Noise reduction on 30h, noise reduction off 55h
Charging time: about 1.5 h
Rated input: DC 5.0V ===1A
Frequency response range: 20 Hz-40 KHZ
Output sound pressure level: 91+/-3dBspl (A)
Nominal impedance: 32