Logitech M100 - Mouse - right and left-handed - optical - 3 buttons - wired - USB - black. Logitech Mouse M100 gives you just the basics for comfortable, reliable control of your computer. There is no software to install. And since it is corded, you can just plug the cable into a USB port and use it right away. The full-size, ambidextrous shape means your hand will rest comfortably, while high-definition optical tracking (1000 dpi) means you will get responsive, smooth cursor control for precise tracking and easy text selection.