*Bluetooth version: V4.1
* Headset Size: *41.5*179mm
*Built-in lithium battery voltage:3.7V
*battery capacity：180mAh
*Loud speaker size: Φ30mm
*SNR(Signal to Noise Ratio): ≥90dB
*Charging input voltage range : 5V
*Charge Time
:Approx .2 hours
*Charger input current requirements : ≤500mA
*headset power：20mW THD≤10%
*Talking time： Approx.8 hours
*Music time :Approx.8 hours ((max. volume 70%))
*Buttons
*MFB
Power on/off；play/pause
* Volume buttons
Volume+,Volume-;next song/previous song
*Accessories
1pc USB charging cable
1pc English manual