Descriptions: 2.4G Cordless Wireless Optical Mouse, good reliability and performance Ergonomically designed, comfort grip Intelligent connectivity, no need to code, Plug & Play Installation. No software driver required Built-In mouse memory, no recording is needed after battery replacement Intelligent power-saving technology, up to 6 months lifespan With 6 Keys, including Scroll Wheel, Page Forward and Page Backward buttons for easy Internet Surfing. 1000dpi/1200dpi/1600dpi, cursor speed adjustable Effective distance is up to 10 meters Shortcut button can be used to browse the Internet or applications, easily on the toolbar \""Forward\"" and \""Backward\"" funcion. USB receiver included, which can be stored neatly inside the mouse when not in use Specifications: Brand New Material: Plastic Color: Red, Blue, Black, Silver, Green Mouse Size: 100 x 62 x 35mm/3.9 x 2.4 x1.4inch (Approx) USB receiver size: 18 x 14 x 5mm/0.7 x 0.5 x 0.2inch Connectivity: Wireless Interface: USB Maxi DPI: 1600(dpi) Note: USB receiver in back slot Remote distance: 10m Key Qty: 5 Buttons + 1 Scroll Wheel ON/OFF switch: turn on or turn off mouse power Compatibility: USB 2.0 or 1.1 Powered by: 2 x AAA battery (NOT included) Compatible with Windows 2000/XP/Vista/Linux/Win 7/MAC System RF: 2402MHz-2480MHz Note: -Due to different producing batches, product details might be a little different. If you minding the difference, please buy it carefully. - Please allow 1-3CM differs due to manual measurement. - Due to the different display and different light, the picture may not reflect the actual color of the item. Thanks for your understanding. Package includes: 1 x Mouse