Feature:1. The left and correct buttons are silent without noise. They provide quiet and comfortable atmosphere, especially suitable for bedroom, library and office work.2. Ergonomic design brings you comfortable hand feeling and effectively reduces wrist fatigue caused by long time use.3. Plug-and-play USB receiver allows the mouse to quickly work without installing any drive program.4. Wireless design, easy to carry and save space.5. Elegant, high-end, low cost, very profitable.Specification:Item Type: Wireless Mouse Model: W12Number of Button: 4 ButtonsMax DPI: 1600DPIDPI Adjustable Switch: 800/1200/1600 DPIBattery: 2 x AAA batteries (NOT included)Switch Life: 10 million timesSupported System: For Windows XP/7/8/10/Vista, For Mac-osx, Linux, AndroidPackage List:1 x Mouse1 x Receiver