feature:Bluetooth Version: V 2.1 EDR Class IIFrequency2400.0-2483.5 MHzBluetooth SupportedHeadset, Handsfree, A2DP and AVRCPChipsetCSROperation Range: 10 MTalk Time: 2-3 HoursMusic Playing Time: Up to 7 HoursStand-by Time: Up to 250 HoursWeight: 103 G