Features:
•Bluetooth chip: CSR BC8635 
•Bluetooth version: Version 4.0 
•Charging voltage: MICRO USB 5V
•Working current: 10-20mA
•Bluetooth Working range: 10M
•Charging Time: 2.5H
•Standby time: 200H
•Working Time: Music state 12 H / Talkingstate 12H
•Battery: 3.7V / 200MAH
•Output power: 2x18mW
•Frequency range: 2.401-2.480GHz
•Distortion factor: ≤1%
•Frequency response: 20Hz-20KHz
•9-SNR: S / N≥95
•Speaker: 16Ω20mW x 2
•ANC frequency 100-1000HZ
•ANC level: 15-20dB
•working environment: -10~60 degree
•Vibration Alert on call

Package List:
1*Bluetooth Headphone
1*User Manual
1*Charging cable
2* Replacement Earbuds