Wireless Mouse Genius ERGO-8200S,1600 dpi, 5 buttons, Ergonomic, Silent, 1xAA, 65g.,Black. RF Frequency : 2.4 GHzSensor engine : BlueEyeResolution (DPI) : 1200Number of buttons : 5 (Left, right, middle button with scroll, : page up, page down)Battery type : AAWeight (g) : Approx. 65 g (includes receive)Dimensions (W x H x D) mm (inches) : 73.5 x 107.8 x 40.6 mm (2.89 x 4.24 x 1.60 inches)User's manual : Yes, : Ergo-8200S (Multi-language) DownloadSystem requirements : Windows® 8, 10, 11 or later / macOS X 10.8 later / Linux OS / Available USB portColors : Black / Chocolate / Purple / Iron Grey : *Product color and images shown on the package are for reference ONLY. For actual items, refer to the physical goods contained herein.What's included : Ergo-8200S : USB Pico receiver x1 : AA alkaline battery for mouse x1 : Multi-language quick guide