Brand W-sound Model WK-300 Quantity 1 Color Black + silver Bluetooth Version Bluetooth v3.0 Ear Coupling Ear Hook Talk Time 8 Hour Standby Time 180 Hour Operating Range 10 meter Compatibility Compatible with Bluetooth v2.0 Microphone Yes Radio N/A Supports Music Format N/A Power Supply Built-in Battery Built-in Battery Capacity Built-in 120mAh polymer lithium battery Compatible With Mobile phones with Buletooth Other Features Frequency range: 2.4GHz; Interface: 1 x Micro USB; Music playback time: 5 hours; Charging time: 3 hours; Voice prompt connect ion function; Two phones connected and using at the same time; DSP: Noise reduction & Echo cancellation; Power Adapter: AC100~240V 50/60Hz (input ) DC5V / 200mA (output) Packing List 1 x Bluetooth headset 1 x Earphones (45cm) 1 x 100~240V EU plug power adapter (34cm) 1 x English / Chinese user manual 2 x Earbuds 1 x Ear hooks