Ruilogod Trackball Mouse - Handheld USB 2.0

Computer Portable 3-button Handheld 4D Mini USB Trackball Mouse Black Off table and without limitation of operational space. 4D page scrolling function can be controlled simply by your thumb. Features 3-button design with trackball. USB 2.0 interface, no software required. Special design, can avoid the harm on your wrist and muscle, greatly reduces discomfort for Arthritis and CTS suffers. Easy to use - left or right hand, or cradled between both. Mini size, light weight, easy to carry. for both laptops and desktops.