Dual profiles-Headset & Hands-free modes Bluetooth Class 2, Version 1.1/1.2 * Excellent sound quality with D.S.P. Solution for echo cancellation & noise suppression * Versatile function key for: pairing; one-touch answer; call rejection; power on/off; last number redial; voice activation (subject to voice activation enabled phones) * Automatic bluetooth re-connection * LED indicate, Volume control * With 5 in 1 charge function (compatible with most of the major mobile phones with Bluetooth of the series of Nokia, Motorola, Samsung, Siemens, Sony-Ericsson.)