Splaks 2.4Ghz Wireless Mobile Optical Mouse 2.4G Tech: This mouse adopts the 2.4G frequency technology, 2.4G will give you a more comfortable, responsive and exact effects than the traditional FM radio wireless mouse Ergonomic Shape: Well-designed, contoured shape seamlessly fits and moves with your palm, with convenient side controls (page back / forward) positioned where your thumb rests. 3 Adjustable Response Levels: 2000,1500 and 1000 DPI levels let you adjust the mouse's responsiveness to suit certains games and other programmes. Auto power-saving: Mouse automatically enters power saving mode after 8 minutes of being idle Plug and play: Tiny wireless receiver conveniently slots into your computer's USB port, taking up minimal space.