Model NO RBT-011 Standard Bluetooth 1.2specification ColourRange White and Black or Silver with the exchange coverUp to 30 feet (10 metres) Audio code Single Audio Frequency 2.4GHZ ISM Band Bluetooth profiles supported handsfree 1.0 and Headset 1.1 Transmitter Power Class 2 Connection Point to point Weight 14 grams Figure size (L) 71mm*(W)23.5mm*(H)24mm Talk time 4 to 6 hours Standby time Up to 180 hours Output power 800 mah Security Security Encrypt Power consumption 30mah (working) Battery 120mah lithium-polymer battery Charging time About 2 hours Operating temperature -10 degrees to 45 degrees. Charging temperature 0 degrees to 45 degrees