Speaker Unit: Φ9mm

Magnet:Neodymium

Sensitivity: 110+/-3dB

Impedance:32 ohms+/-10%

Frequency range:20~20KHz

Active cancellation: 20~25dB 

Headset battery capacity:40mah

Charging bin capacity: 500mah

Blue-tooth version:  BT8892E   V5.0

operation distance:10m

Continuous working time:20 hours