BlackBerry HS-500 Bluetooth Headset Has automatic volume control Has one touch calling Equipped with noise-cancellation technology Dual Microphones & Noise Cancellation Dedicated On/Off Power Switch A2DP Enabled, GPS Mapping Turn-By-Turn Directions Announced Includes Vehicle Power Adapter to Keep Your Headset Fully Charged  Even on the Road Universal Bluetooth Connection For Any Bluetooth Equipped Handset