B-Move BH-TW02. Device interface: RF Wireless, Purpose: PC/server, Recommended usage: Home. Movement resolution: 1600 DPI, Movement detection technology: Optical, Scroll type: Wheel. Frequency band: 2.4 GHz, Wireless range: 10 m. Wireless receiver interface: USB. Keyboard dimensions (WxDxH): 475 x 20 x 200 mm, Keyboard weight: 940 g, Mouse weight: 110 g