MS-Tech Stereo Headset. Device connectivity: Wired, Cable length: 2.5 m. Headphone frequency: 20 - 20000 Hz, Headphone sensitivity: 103 dB. Microphone input impedance: 10000 Ом. Package dimensions (WxDxH): 255 x 205 x 78 mm. Connector(s): 3.5 mm