ELECOM Left-Handed 2.4GHz Wireless Thumb-operated Trackball Mouse, 6-Button Function with Smooth Tracking, Precision Optical Gaming Sensor (M-XT4DRBK)

?Used diameter 2.5mm big Artificial ruby as support ball. Except the basic performance, it has new performance.
?With advanced optical sensor for exceptionally smooth tracking, Thumb-operated type USB trackball.
?We acquired FCC certification. FCC certifies that the electromagnetic interference from the device is under limits approved by the Federal Communications Commission.
?Interfac...