COMPACT & PORTABLE : You can take the wireless mouse wherever you take your laptop, thanks to its pocket-sized compact design (3.94 x 2.36 x 1.5 inches) 2.4GHZ RELIABLE CONNECTION : 2.4G connectivity provides fast transmission and virtually no delays , working distance can up to 33 feet (10 meters) ; the real plug and play design, no need to install drivers COMFORTABLE DESIGN : TeckNet computer mice keeps your hand happy-even after long hours of use-thanks to its contoured shape and soft rubber roller ONLY REQUIRE 1 AA BATTERY : It takes only 1 AA Battery(NOT Included) to operate this mouse, and the wireless mouse will turn to sleep mode after a few minutes of inactivity for energy saving, can be easily activated by clicking any buttons UNIVERSAL COMPATIBILITY : Well compatible with Windows 2000, XP, Vista, 7, 8, 10 and Mac OS X 10.4 etc ; pls note: this mouse is connected by USB receiver, will not compatible with Macbook Pro or other devices which only have Type C ports