This is a set of a trackball sensor reading board and a 7-pin L-shaped con-through for the Keyball series (39, 44, 61). Please purchase the pmw3360 sensor itself separately. (Sensor sets are also available for an additional 2000 yen. Thank you.) ■ Set Contents ・Sensor reading board ・L-shaped con-through (7-pin) Genuine product ※ The through-hole diameter of the reading board has been adjusted, so you can fix the con-through without soldering. We have tested multiple units from the same lot over a long period of time and confirmed that there are no problems. The L-shaped con-through has been cut to 7 pins by the manufacturer, so the cross-section is clean. It is of the same quality as the one included in the kit. DIY keyboard Mechanical keyboard Split keyboard Split keyboard Trackball reading board corne cherry keyball roBa moNa Keyboard with trackball Hot-swappable