Gembird Wireless Optical Mouse - Space grey/Black

4-button wireless optical mouse with USB Nano-receiver. CPI button for quick resolution changes (800 - 1600 DPI).Wireless technology: 2.4 GHz, GFSK RF modulation, 80 channels, 32 bit device ID. Operating distance: up to 10 m. Power class: RF power 3 dBm (max. EIRP). Internal antenna type; antenna gain in dBi (typical): 2 dBi ?1 dBi. Optical resolution: 800, 1200, 1600 DPI selectable by the button. Power supply: AAA battery x 2 pcs (not included)