Philips SHM1900. Device connectivity: Wired, Device interface: 2x 3.5 mm, Cable length: 2 m. Headphone frequency: 20 - 20000 Hz, Impedance: 32 Ом, Headphone sensitivity: 100 dB. Microphone frequency: 30 - 15000 Hz. Width: 175 mm, Depth: 92 mm, Dimensions (WxDxH): 175 x 92 x 199 mm. Packaging width: 175 mm, Packaging depth: 95 mm, Packaging height: 250 mm