MediaRange Wireless mono headset with microphone, 180mAh battery

_x000D_\n Connections: Bluetooth _x000D_\n Bluetooth version: CSR8612-V4.0 CLASS2 _x000D_\n Bluetooth protocols: HFPV1.6, HSPV1.2, A2DPV1.2, AVRCPV1.4 _x000D_\n Bluetooth frequency range: 2.4GHz -2.480GHz _x000D_\n Transmission distance: 10 meter _x000D_\n Work time: up to 12 hours _x000D_\n Standby mode: up to 250 hours _x000D_\n Flexible microphone arm _x000D_\n Continuous volume control _x000D_\n Padded ear pad _x000D_\n Technical data headphones: _x000D_\n Speaker Diameter: 28mm _x000D_\n Max. output power: 3mW _x000D_\n Impedance: 150Ω _x000D_\n Sensitivity: 118±3dB _x000D_\n Distortion factor: <1% _x000D_\n Noise-signal ratio: <30db _x000D_\n Frequency Range: 20Hz – 20kHz _x000D_\n Technical data microphone: _x000D_\n Sensitivity: -40 ± 3dB _x000D_\n Frequency Range: 20Hz – 20kHz _x000D_\n Weight: 55g _x000D_\n Dimensions: 150 x 175 x 40 mm _x000D_\n