Foldable, 2.4GHz full size wireless optical mouse that folds to compact travel size. 2 way transmission technology, operating range 30 feet. Top IC chip (A3000) & RF solutions (A4302) within the wireless industry. A true 2-in-1 single chip optical tracking DPI switch & indicator to change speed (1000/1500/2000). Infrared sensor to pass any rough surface on desk. Plug and Play Nano in body of mouse. Window PC, Mac compatible. 2 AAA alkaline batteries (included). Ergonomic design that's convenient to bring wherever you go.