A2DP mono Bluetooth Headset Incoming call and out-of-range alert by BEEP sound LED Indicator for different status Multi-point connection with two Bluetooth enables devices Automatic Re-connection with your headset and Bluetooth enables devices Voice Dialing and last number Redial functionsBluetooth Version V4.0 Bluetooth Chipset CSR Radio Freq 2402-2480MHz Transmit Power Class II Receiver Sensitivity -92dbm Charging Voltage DC 5V Battery Type Rechargeable Li-Polymer 100mAh Talk / Music Time 7 hrs / 6 hrs Standby Time 240 hrs Charging Time 1.5 hrs Weight 23G Dimension L55 x W25.5 x H14.7