Keep your hands on the wheel and your eyes on the road with a wireless Bluethooth headset. The MAX4 blocks out 4 times more background noise than other headsets. It is comfortable to wear on your left or right side and simple to operate. This headset features MAX4 noise cancellation technology to block out amibent noise. Compatible with most Bluetooth enabled phones, including BlackBerry. Voice activated dialing, call waiting and 3-way call capabilities. One-touch volume control, call answer/end and redial. Lightweight design, 1.5 oz. Wall and auto chargers included. Rechargeable li-polymer battery for long life. 8+ hours talk time and 250+ hours standby time. 30' working range. Access code correlation and audio transcoding. 2 year manufacturer's warranty. DOT approved!