Specification 1) Frequency: 2.4GHz-2.4835GHz ISM spectrums 2) Profiles: Headset and hands free 3) Output power class: Class 2 4) Pico net: Point-to-point 5) Security: Pairing, encryption, and authentication 6) Battery: Rechargeable lithium polymer 7) Battery voltage: 3.7V DC 120mAh 8) DC power input: 5.0V DC 100~240V AC adapter 9) Power consumption: A) Talking 30mA@3.3V DC B) Standby 1.8mA@3.3V DC C) Off 0. 15mA@3.3V DC 10) Talk time: Up to 4 hours 11) Standby time: Up to 200hours 12) Nominal charging time: Within 2 hours Our company supply many kinds of Blue tooth headset in high quality and good price, welcome the buyer all over the world to stock the product. You can find more information and specification about the product in the website of the company.