Wireless Mouse, THZY 2.4Ghz Wireless Mobile Optical Mouse with 6 Buttons, 3 DPI Levels, USB Wireless Receiver - Dark Grey 2.4G WIRELESS TECHNOLOGY. Adopted the 2.4G frequency technology, working distance can reach up to 8M-10M. 2.4G will give you a more comfortable, convenient and exact effect than the traditional FM radio wireless mouse. EASE OF STORAGY. USB Nano Receiver is easily stored inside the back of the mouse. Tiny USB receiver occupies minimal space when attached to your computer. Infrared technology ensures smooth track over a variety of surfaces. HAND FRIENDLY DESIGN. 3D Buttons (left, right and scroll wheel buttons). Next/Previous buttons provide convenience while web browsing; Soft rubber grip and contoured body deliver continuous, all-day comfort. WIDE COMPATIBILITY. Works with Window 98/2000/NT/ME/XP/win7/Win8; No driver needed, plug and play. 3 adjustable DPI levels (800/1200/1600). LONG BATTERY LIFE. Auto Energy-Saving Sleeping Mode. The Auto Switch Off function will help you save energy when your PC sleeps or is turned off. 6-month battery life on 2 AAA battery (battery NOT included) practically eliminates the need to replace battery. Battery life may vary based on user and computing conditions.