Ergonomic Vertical Design: Unique vertical mouse with a special volute bionic design alleviates arm discomfort and stiffness. Entry-Level Ergonomic Vertical Mouse: The special curved back, thumb groove, delicate button layout, and anti-skid rubber coating help you adapt more easily and comfortably to using a vertical mouse. Enjoy a comfortable grip. 4 Shift DPI: 800-1200-2400-3200 (default 4 levels), up to 4200 DPI adjustable via driver. Easily change settings according to your daily work requirements using the switch on top. Features a 1000 polling rate for fast response. Removable Wrist Rest: Allows your forearm and mouse to function as a single unit, lifting your wrist off the ground and protecting it from friction during mouse movement. [All products include a 12-month warranty and free lifetime technical support] Wide Compatibility: Compatible with Windows XP, Vista, 7, 8, 10 operating systems. (Compared to traditional mice, with its unique ergonomic vertical design, it may take a few days to get used to using it).