The Porlei TM552 Wired Finger Trackball Mouse is a red trackball mouse designed for right-handed users with a large hand. It features an ergonomic design with a thumb button and adjustable DPI up to 1600. This mouse offers 4-way scrolling, side-to-side scrolling, and optical tracking method for precise control. With 6 buttons and wired connectivity, the Porlei TM552 is a comfortable and efficient trackball mouse for navigating through your computer with ease.