The MP230L Performance Mouse's unique track-on-glass sensor uses a high-definition laser that will follow your hand movements on a wide variety of desk surfaces. The 2.4GHz wireless connection via a USB nano receiver means there are no cords to clutter up your desk. The mouse is full-sized, offering complete comfort in an ergonomic design. In addition to the traditional two-button and scroll wheel top, side buttons offer quicker browser navigation. DPI adjustment buttons allow you to control the cursor tracking speed. And with Plug & Play installation, you'll be up and clicking almost the instant you plug in.