YUMQUA Y-01 Portable Mini Finger Hand Held 4D USB Wired Trackball Mouse for Laptop Mac Window Computer Fits Left and Right Handed Users -Black YUMQUA mini wired trackball mouse, off table and without limitation of operational space, 4D page scrolling function can be controlled simply by your thumb. Ambidextrous Design. 3-button trackball mouse, works equally well for both right-handed and left-handed users. Ergonomic Design for Long-Term Comfort. Portable handheld trackball mouse can avoid any harm on your wrist and muscle, greatly reducing the chances for Arthritis and CTS suffers. USB 2.0 interface, plug and play, no software required. Compatible with Windows,Linux,Unix and Mac OS System. Wired trackball mouse is suitable for Mac,Laptop & Desktop Computer.