■ EX-G PRO, a wireless track ball with a high spec model that uses long service life components. - Thumb operation type that is easy to operate with the palm of your hand. - The left and right buttons use 10 million times heavy duty switches made by OMRON, which are highly reliable for durability and a reputation for a click feel. ■The wheel scroll adopts excellent optical encoders with excellent durability and no parts wear during operation. ■ By adopting long lasting parts, we have a 3 year warranty period.