The Porlei TM552 Wired Finger Trackball Mouse is designed for larger hands, making it ergonomic for comfortable use. With a blueish gray body and blue trackball, this optical trackball mouse boasts a maximum DPI of 1600 and features like an adjustable DPI, thumb button, scroll wheel, and side to side scrolling. It is ideal for right-handed users looking for a user-friendly trackball mouse with easy connectivity via USB. With 6 buttons and 4-way scrolling capabilities, this Porlei trackball mouse offers a reliable and efficient pointing experience for various computer tasks.