Features: 1) No wires, no mess behind the wheel 2) Compact, versatile, comfortable and powerful 3) Can listen to music at your own comfort 4) Bluetooth 1.1 compliant 5) Class 2 TX power 6) Frequency: 2.4GHz 7) Channels: 79 8) The longest standby time: 200 hours 9) The longest talk time: six hours 10) Rechargeable battery Li-polymer 11) Working range: indoor 5 meters, outdoor 10 meters 12) Headset and hands-free profiles 13) Voice dialing function to support your mobile phone 14) Basic call handling from the headset with adjustable volume control 15) Keeps user away from electromagnetic wave of mobile phone 16) Allows you to be hands-free and cord-free all day long 17) Can be worn comfortably on either ear 18) Light and balanced weight design offers wearing comfort