Wasp WWR2900. Sensor type: Photo Diode, Light source: LED, Wavelength: 650 nm. Interface: PS/2, Cable length: 1.82 m. Input voltage: 5 V, Current consumption: 45 mA. Dimensions (WxDxH): 150 x 22 x 29.6 mm, Weight: 76 g. Operating temperature range (T-T): 0 - 50 °C, Storage temperature range (T-T): -20 - 60 °C