Wireless usb optical mouse with headlight and fashion sport car design,cool gaming mouse for laptop computer,good choice for using or as gifts for kids,women,men Powered by 2 AAA battery(not included),Size: 4.4x2.16x1.42 inch,Net weight: 2.12 oz,1600 DPI,3 Buttons (Push the top cover,then you can see the USB receiver and battery slot inside) Plug and Play, no any drive is needed Power-saving sleeping function,if the mouse is not used for short time, it will turn to power saving mode to save energy 2.4GHz wireless digital transmission technology, operation distance is up to 10 meters Support most operating system,Windows 98 or ME or NT or 2000 or XP or Vista or Win 7 or Linux or Mac OS and more Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.