Specification:

· Bluetooth protocol: version 2.0
· 2.4 GHz wireless Bluetooth frequency.
· Bluetooth range: 10meters.
· Using the hands free Bluetooth profile, it is
   compatible with Audio Gateway (In/Out) for all
   Bluetooth enabled PCs,PDAs, and Cellphones.
· Crystal clear sound quality and weighs only 15g.(approx.). 
· Voice-dial function with mute button.
· Li-Ion battery power ensures more than 8 hours
   speaking and 220 hours standby time.
· Size: 53.5mm*25.5mm*23.8mm