Description: Sliding Boom Mic Light weight Adjustable ear-hook ( fits both ears) Soft ear rubber attached Slim on/off switch and microphoneSpecifications:SPK Dimension:φ15 Impedance:32Ω at 1K HzSensitivity:105dB±3dB at 1KHZFrequency response: 20-20,000HZRated Power:5mWMic Dimension:φ6×5Sensitivity:-58±2dBwire length:90CM