Perixx PERIDUO-707 Plus. Device interface: RF Wireless, Purpose: PC, Recommended usage: Office. Movement resolution: 1000 DPI, Movement detection technology: Optical. Frequency band: 2.4 GHz, Wireless range: 10 m. Wireless receiver interface: USB, Receiver type: nano. Keyboard dimensions (WxDxH): 141 x 320 x 25 mm