about this project ERGONOMIC VERTICAL DESIGN - The scientific ergonomic design provides better support and more comfort for your hands, and reduces forearm and wrist twisting caused when using a traditional mouse. Minimum size: 4.1*2.6*2.36 inches. Wireless Freedom - Avoid the hassle of being tethered to wires or cables and connect wirelessly to your computer with the included dongle transceiver. The mouse is a simple plug-and-play device that is automatically detected by your computer when plugged into a USB port. (Note: The USB receiver is stored on the bottom of the mouse.) 3 ADJUSTABLE DPI & RECHARGEABLE - DPI800/1200/1600, the higher the DPI, the faster the cursor moves on the screen. Adjust the DPI as needed. Built-in rechargeable battery. You no longer need to buy batteries. BACK AND FORWARD BUTTONS - This wireless computer mouse, the shortcut button on the top of the thumb, provides convenience while browsing the web, you can easily access it. Great choice for surfers, gamers and those who spend long hours in front of a computer. (NOTE: Forward and Back buttons are not recognized on Mac). Plug and play, widely compatible - no lag, no connection loss. Setup is easy, no driver installation required, just plug the receiver into a USB port and it's easy to use. Widely compatible with Windows 2000 / XP / Vista / 7 / 8 / 10 / Linux. Compatible with desktops, laptops, PCs, Chromebooks and other devices. Easily meet all your needs and routines. south holiday