Glow USB Wired Ergonomic Backlit Ambidextrous High Performance Laser Trackball Made In the USA CST2545-5W (GL) (L-Trac Red) 5-Button (Black) -

Laser tracking, adjustable resolution up to 1600 DPI. Red USB laser trackball with black buttons, globes, and scroll wheel. Two additional input jacks on top of the trackball. The large 2.25-inch (57mm) trackball lights up red when in use. Compatible with external switches such as feather touch switches and foot switches. The X-keys L-Trac trackball features a large, high-density trackball housed inside a high-impact ABS molded enclosure. This enclosure is ergonomically designed to fit the contours of your hand, eliminating side-to-side arm and wrist movement. The trackball is suitable for both left- and right-handed users and all hand sizes. The easy-to-use trackball is suitable for people with disabilities and physical impairments. The faster you turn the trackball, the faster the cursor moves across the screen. The large, high-density trackball combined with a stainless steel roller provides a "silky smooth" feel and easy control. Laser tracking with adjustable resolution of 400, 800, or 1600 DPI. True three-button design allows for up to two additional external buttons.