aLLreLi M111BU USB Optical Mouse for Mac & PC - White ERGONOMIC DESIGN This wired mouse fits easily into the palm of your hand, so you can move it quickly and with less strain on your wrist and fingers SMOOTH ROLLING WHEEL Office mouse wheel rolls easily with no resistance, allowing fluid scrolling NO BATTERIES REQUIRED Wired mouse is powered by USB for your convenience EASY TO USE Mouse plugs into any standard USB outlet and has a plug and play design that allows you to begin using it instantly SLEEK AND STYLISH Office mouse will have your desktop looking professional!