Cherry G84-4100. Device interface: USB+PS/2, Purpose: PC, Recommended usage: Office. Cable length: 1.75 m. Keyboard dimensions (WxDxH): 282 x 132 x 27 mm, Keyboard weight: 0.4 kg. Power source type: USB. Operating temperature range (T-T): 0 - 50 °C, Storage temperature range (T-T): -20 - 65 °C