Natural ergonomic vertical with right-handed design. Recommended to repetitive strain injuries (rsi) users and users work particularly Long periods on the computer Optical sensor and Built-in DPI switch button. You can switch DPI between 800/1200/1600; 'Plug and play' mouse with nano USB receiver Built in power on/off switch button and power saving function. One AA battery needed (battery is not included in the package). nano USB receiver with storage compartment Compatible with Windows 7, 8, and 10; wireless 2.4G connection Computer mice ergonomic vertical mouse wired wireless