Built-in microphone & volume control key, universally compatible with all audio devices.
Bluetooth distance: 10m
Battery: 300mAh
Charging voltage: DC 5V
Loudspeaker size: 40mm
Speaker impedance: 32Ohm
Working time: Music 4-6h, Call 8-10h
Bluetooth version: 4.1+EDR
Power rating: 40mw
Working voltage: DC 3.7V
Sensitivity: 20-20kHz
