Rechargeable Noise-Cancelling Multipoint Bluetooth v3.0 Wireless Headset with Boom Microphone (Black) Blueooth V3.0, Easy Pairing Talking time: Up to 8 hours, Standby time: Up to 200 hours, Battery: 3.7V/120mA Li-polymer, Charging time: Up to 2 hours, Working range: Up to 10m Sensitivity: &gt;-85dBm, Temperature: -20-60 C Hearing aid compatible, Voice activated dialing, One-touch button call answer/end Touch button volume control, Fits comfortable on either ear, Balanced and light weight, Can connect to two devices