UMEI Ergonomic Mouse High Precision Optical Vertical Mouse Adjustable DPI 800-1200-1600 Wireless mouse ?Excluding batteries?

UMEI Wireless optical mouse Ergonomic Mouse Compared to the traditional mouse, the vertical mouse snugly fits your palm and keeps your hand and arm being in a more natural position, reduces pain and discomfort. The mouse is a good choice for people who work at the computer for a long time. Features .Ergonomic contoured design, close to 85-degree angle. DPI levels:DPI 800/1200/1600 . Wireless distance can reach 10 meters Over 10 million times keystroke. Anti-sliding rubber oil coating surface. High-performance chip ensures fast and accurate movement for precise control. Shortcut Keys Press DPI Button and Scroll Wheel to turn off "the backlight flashes once click" function. . Long press DPI button to turn on/off the backlight. Notes Adjust the DPI sensitivity among four levels via DPI button. "One key switch", NO need any drivers to control. The mouse performs well on the mousepad, it works on the ordinary desk, but not for all surface. The mouse size is suitable for the most of people. If you never use this kind of ergonomic vertical mouse before, it may take several days to get used to it. Specifications Model No.: JSY-5 Interface: USB 2.0 Tracking Type: Optical DPI Levels:DPI 800/1200/1600 Polling Rate: 125Hz Tracking Speed: 32 ips (MAX) FPS: 4000 (MAX) Acceleration: 12g (MAX) Weight: 101g Compatible with Windows 10/8/7/XP/Vista, Mac OS, Linux Product information Color:black Product Dimensions4.8 x 2.4 x 3.1 inches Item Weight5.3 ounces Package included: 1 x 2.4GHz Wireless Mouse ? Excluding batteries? 1 x USB receiver