There is an upper computer in the programmable time controller to make the load output change over time. the customer may customize schedule mode they want through the upper PC. Then through the USB port to download required schedule to the controller.Adopt type-c interface, easy to connect to PC. The upper PC in addition to the function of editing schedule mode ,it also can be setup time for the controller because of synchronous clock function of upper host.If user want to see the schedule mode effect after editing , they can use fast sowing function of upper. Because there is no delete function of the upper host ,so the mode name display space will come into blank as long as you execute delete.This controller can control load of led changing effect no more than five channels .And it can be used in the occasion of the plant lights, light box advertising, the stage, , etc Working temperature:-20-60 Supply voltage:DC12-24V static power:Less than 1W Output: 5 channels Max load current:20A Connecting Mode: Common anode the controller output frequency of 600 hz A single mode can set up to 50 time nodes. Colour:black Material:metal+plastic Package Contents: 1 x mini timer program controller Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.