JETech M0886 2.4Ghz Wireless Mobile Optical Mouse w/6-Month Battery Life - Black Extremely long upto 6-month battery life with 1 AA battery (NOT included) Compatible with Windows 98/2000/NT/ME/XP/win7/Win8/Win10; No driver needed, plug and play. 3 adjustable CPI levels (800/1200/1600) Note: the USB receiver is inserted in the back of the mouse. Adopt the 2.4G frequency technology, working distance can reach to 8M-10M. 2.4G will give you a more comfortable, convenient and exact effect than the traditional FM radio wireless mouse. Infrared technology ensures smooth track over a variety of surfaces. Tiny USB receiver occupies minimal space when attached to your computer. Package includes: 1x JETech 2.4Ghz wireless optical mouse with nano receiver, instruction manual, life-time warranty card