Descriptions: 2.4G Cordless Wireless Optical Mouse, good reliability and performance Ergonomically designed, comfort grip Intelligent connectivity, no need to code, Plug andamp 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 or 1200dpi or 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 andquot andquot Forwardandquot andquot and andquot andquot Backwardandquot andquot 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 or 3.9 x 2.4 x1.4inch (Approx) USB receiver size: 18 x 14 x 5mm or 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 and 1 Scroll Wheel ON or 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 or XP or Vista or Linux or Win 7 or 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