Keytronic KT800P1M PS2 Keyboard and Mouse. Device interface: PS/2, Keyboard layout: QWERTY. Movement resolution: 800 DPI, Movement detection technology: Optical. Operating temperature range (T-T): 0 - 40 °C, Operating relative humidity range: 5 - 90 %. Depth: 171 mm, Height: 38 mm, Width: 455 mm