Trust MULTI FUNCTION HEADSET. Interface type: 3.5 mm stereo plug. Headphone frequency: 50 - 13000 Hz, Headphone sensitivity: 109 dB, Impedance: 32 Ом. Microphone frequency: 20 - 16000 Hz, Microphone sensitivity: 62 dB. Dimensions (WxDxH): 150 x 300 x 50 mm, Weight: 0.11 kg. Package dimensions (WxDxH): 172 x 50 x 240 mm, Package weight: 0.17 kg