Wireless Mouse - The reliable wireless 2.4 GHz connection with up to 33 feet operating range, this ergonomic mouse was designed especially for small hands and comfortability. DPI Switch - Optical sensor and built-in DPI switch button so you can switch DPI between 800/1200/1600 allowing you to tailor your tracking experience to your personal needs. Plug and Play Feature - Plug and play mouse with Nano USB receiver means it is easy to start using immediately with no additional drivers or installations. Built-in power on/off switch button and power saving function to save as many batteries as possible through this mouse's lifetime. System Requirements - Windows 7, 8, 10 and above Dimension - 16.97 x 5.12 x 2.6 inches DPI - 800/1200/1600 Operating Range - Up to 33 ft.