V7 CK2A0-4E2P. Device interface: RF Wireless, Purpose: PC, Recommended usage: HTPC. Movement resolution: 1200 DPI, Movement detection technology: Optical, Scroll type: Wheel. Frequency band: 2.4 GHz. Wireless receiver interface: USB, Receiver type: nano. Keyboard dimensions (WxDxH): 430 x 130 x 24 mm, Keyboard weight: 440 g