Bornd 3 Buttons 15m Operating Range 2.4G Wireless Optical Mouse (E230 Black) Variety of color designs break away from traditional boring patterns Compatibility: Win98, Win98 SE, Win2000 or Win XP, Win ME, Vista, Win7, Win8 Operating Range: 15 m Resolution: 1000/ 1500/ 2000 DPI Buttons: 3 (left, right, scroll)