Main Features: - 2.4GHz wireless transmission for a stable and smooth control - With Page Forward and Page Backward buttons for easy Internet Surfing - Intelligent connectivity, no need to code, plug-and-play - Auto-sleep function, more power-saving - MAX. acceleration: 10G - With DPI button can adjust the DPI according to your need ( MAX. 2000DPI ) - Anti-skid base for stable placement - Ergonomically designed, comfortable grip - Decent and modern design - Ideal laptop companion for home and office use - Operation systems: Windows 2000, Me, XP, Vista, Win 7, MAC - Power: 2 x AAA battery ( not included )