Microsoft Comfort Curve Keyboard 3000. Device interface: USB. Cable length: 1.524 m. Keyboard dimensions (WxDxH): 175 x 33 x 470 mm, Keyboard weight: 600 g. Operating temperature range (T-T): 0 - 35 °C, Storage temperature range (T-T): -40 - 60 °C, Operating relative humidity range: 5 - 80 %. Certification: FCC, CE, WEEE, UL, CB