The use of plastic ball as the track ball has a long history, was first used in medical equipment, which is used as a key, with the plastic ball trackball technology step into mature, more and more products with a plastic ball track ball to control the direction of the ship on the plastic ball navigation keys. Small plastic ball trackball with mobile phone, the earliest use of plastic ball trackball is the Blackberry mobile phone mobile phone manufacturers abroad, but also to domestic mobile phone has become fashionable for a time, with really hot for a while, the latest applications are used in UAV remote control, the plastic ball is smooth, flexible rotation direction. High control sensitivity, so a UAV remote trackball is preferred.