Bluetooth specification: V2.1+EDR Class II
Speaker diameter: 30mm
Frequency range: 2400.0-2483.5MHz
Transmission distance: 10m
Sensitivity: -42DB
Talk time: more than 10h
Noise reduction: active noise reduction
Talk time: more than 10h
Charging time: ≈3h
Listening time: 5h or more
Standby time: 250h or more