Bluetooth headphone with mic
•Certificates: FCC, BQB
•Microphone: yes
•Remote control : play, stop, pause, volume up and down
•Driver unit: Φ40mm
•Impedance: 32ohms
•Sensitivity: 105±2dB S.P.L.at1KHz
•Frequency response: 20Hz-20,000Hz
•Battery type: built-in lithium ion rechargeable battery
•Battery charging (approx): 3 hours
•Working time: 8- 10 Hours
•Connect with other audio devices by 3.5mm cable