Features: 1) Version 1.2 Bluetooth profile supported headset and handsfree profiles 2) Frequency range: 2.4GHz 3) Spectrum working distance range: 10m 4) Dimensions (main unit) (L x W x T): 68.5 x 23.0 x 12.2mm 5) Weight (main unit): 12g 6) Charging time: within 2.5 hours 7) Talk time: up to 5 hours 8) Standby time: up to 200 hours 9) Rechargeable battery: lithium polymer, 3.6V, 150mAh installed Packing: carton