Features: Five button mouse with scroll wheel for efficient scrolling and navigation within documents and web pages. CPI button switches between 400 dpi, 800 dpi, and 1600dpi to provide ideal mouse responsiveness. Side buttons allow for one-click back-and-forth web page navigation. 2.4GHz technology for maximum performance, range (up to 30 feet), and extended battery life. Plug-and-play operation with nano USB receiver. No driver software or synchronization required. Nano receiver stores inside mouse for travel convenience. Operates on two AAA batteries (included) with sleep mode and on/off switch for extended battery life. One-year warranty. Compatible with Windows 7/VISTA/XP/2000/98 and Mac OS 9 and later.