Approx APPKBWS02. Device interface: RF Wireless. Movement resolution: 1600 DPI, Movement detection technology: Optical. Wireless range: 10 m. Keyboard dimensions (WxDxH): 412 x 120 x 15 mm, Mouse dimensions (WxDxH): 60 x 30 x 95 mm. Battery technology: Alkaline, Battery type: AAA