Mini portable pocket computer mouse for travel; 3.23*1.97*1.26 inches, net weight: 1.4 ounces Laptop optical wireless mouse with USB receiver, powered by 1*AAA battery (not included), 1600DPI, 3 buttons The USB receiver is located on the bottom of the mouse; to locate the battery slot, gently open the top cover from the back 2.4GHz fast wireless transmission, operating distance up to 10 meters; compatible with Windows XP, Vista, Win 7, ME, 2000, Mac, Linux, etc. If it is not connected, please turn off the mouse switch, pull down the USB receiver, then insert the USB receiver and turn on the mouse switch again, while pressing 3 buttons (left button, right button, scroll wheel) for about 3-5 seconds Small and light, easy to carry