UNIQUE VERTICAL MOUSE - The pleasantly soft ergonomic mouse is designed to fit your hand, the unique vertical shape reduces the muscle tension of your arm and adapts perfectly to numerous shapes and sizes of hands. The textured rubber surface of the thumb rest provides extra comfort. Long battery running time and 6 buttons: built-in 1200 mAh battery, real power vertical mouse after full charge approx. 120 hours continuously. Charging time is approx. 2 hours When charging, the light on the scroll wheel turns green and this light goes off after the battery is fully charged. ECHTPower ergonomic mouse with 3D scroll wheel, DPI buttons, left and right mouse button, forward and back button offers you a more convenient way when surfing the Internet. 2.4 GHz wireless technology: with 2.4 GHz wireless technology, the connection can be quickly and stable within 10 m and the mouse is plug play and requires no additional drivers to install, just plug the USB receiver on your PC and then the mouse can work without delay, is a good helper for everyday life and in the office. Compatibility and installation: This mouse is compatible with Windows 7, 8, 10, Windows XP, Vista, ME, 2000 and Mac OS, or the latest system. Simply connect the included USB receiver to the USB port of your computer, no additional driver is required. NOTE: 1. The size of the product is measured manually, and there will be an error of 2-3mm due to factors such as different measurement tools and measurement methods. 2. This product is all taken in kind, but due to differences in photography, lighting, color deviation, and personal understanding of color. As a result, there may be some color difference between the actual product and the photo, and the color is subject to the actual product. 3. Please take good care of our products