Elecom Mouse Wireless/Bluetooth Trackball Thumb 8 Buttons Tilt Function Black M-XPT1MR ■ This is the high-spec wireless trackball "EX-G PRO" that uses long-life parts. ■ This is a thumb-operated type that is easy to operate by placing your palm on it. For wheel scrolling, an optical encoder with excellent durability is adopted, which has no wear and tear of parts during operation. ■ A high-performance optical sensor of gaming grade is adopted for the sensor that detects the movement of the trackball, and the color of the trackball, the thickness of the coating layer, etc. are thoroughly analyzed for the optimal optical sensor, realizing the ultimate pointer tracking performance. ■ In addition to the left and right buttons and the "forward/back" buttons, it is equipped with a tilt wheel and 3 function assignment buttons, for a total of 8 buttons. ■ Equipped with 8 buttons and a tilt wheel that supports left and right scrolling, you can assign your favorite functions to all buttons and the tilt wheel in two directions, for a total of 10 locations.