Features: 1) Bluetooth protocol: version 1.2 2) 2.4GHz wireless Bluetooth frequency 3) Bluetooth range: 10m 4) Using Bluetooth profile, it is compatible with audio gateway (in/out) for all Bluetooth enabled PCs, PDAs, and cell phones 5) Crystal clear sound and weighs only 12g 6) Voice-dial function with mute button 7) Li-Ion battery power ensures more than 4 hours speaking and 150 hours standby time Outer packing: Color box