Style name: 1) Individual item introduction ? Gaming grade high-performance optical sensor is mounted on the sensor that detects the movement of the trackball, and outstanding pointer followability is achieved by optimizing the high performance lens and peripheral optical design doing. ? Adoption of a large-sized artificial ruby ??having a diameter of 2.5 mm as a supporting ball improves the feeling of maneuvering. Also, due to the large diameter of the support ball, the support ball becomes difficult to be buried in garbage such as a hand, and the frequency of maintenance is reduced. ? Focusing on the skeletons / muscles of the six hands in contact at the time of operation, the design that takes into consideration the indentation and the bulge realizes a new “felt comfort” that is as easy to operate as if the shape of the palm was directly projected . ? Tilt wheel that can scroll left and right just by tilting the wheel is carried. It is convenient for operation of long screen horizontally such as Excel. ? Function assignment of buttons can be changed using “Elecom Mouse Assistant” which can be downloaded for free. ? It is easy to remove the ball from the hole on the back, easy to maintain the ball and the inner ball catcher. ? It is a simple package model that makes unpacking work easier. Attention (Disclaimer)> Please be sure to read * Updating to the latest version of each OS and installation of service pack may be necessary. The horizontal scrolling function can not be used in RT 8.1.