Deltaco HL-56. Device connectivity: Wired, Device interface: 2x 3.5 mm, Cable length: 2.5 m. Ear coupling: supraaural, Headphone frequency: 20 - 20000 Hz, Impedance: 32 Ом. Microphone frequency: 30 - 16000 Hz, Microphone sensitivity: -40 dB, Microphone input impedance: 2200 Ом. Dimensions (WxDxH): 290 x 250 x 100 mm, Weight: 200 g. Depth: 250 mm (9.843 "), Depth: 250 mm, Height: 100 mm (3.937 ")