This controller is double shafts sunshine tracing controller, it adopt the high precision internal and external ring hole type sensor to detect the sunshine direction, process analyse judgement through the SCM electric circuit on the controller to the sensor signal, execute the whole process of tracing sunshine through the corresponding motor of electric relay assembly control on the electric circuit board. At the same time, it still has the functions such as leveling when meet wind (need optionally configure the air speed sensor), reset in cloudy day or night, adopt the English liquid crystal display to indicate the corresponding parameters, and to use the on the controller or of infrared controller (need optionally configure the remoter) to set parameters. This controller corresponding required to be double freedom , motor of is DC brush motor, the motor voltage is 12V or 24V, current of single motor must be less than 15A (default that each one shaft configure 10A fuse). Four direction of all should have limit switch. Material: plastic colour: white + black Package Contents: 1 x Main Controller 1 x Remote Control 1 x Wind Speed Sensor Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.