This Kensington Expert Mouse 4.0 is a top-of-the-line trackball that offers unparalleled precision and control. With its advanced design and ergonomic shape, this trackball is perfect for gamers, designers, and anyone who needs a high-performance input device.The trackball is brand new in box, making it an excellent gift for a friend or loved one. It is compatible with a variety of devices, including computers, tablets, and networking equipment. This trackball is the perfect upgrade for anyone looking to take their computing experience to the next level.