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Contact Supplierthis control unit fully automates the projector screen control.
how it works:-
the power to the projector is connected via the projector trigger unit. When projector is turned on, a power draw is detected which sends a rf signal to the screen control unit exactly the same way you would have pressed the down button on the screen remote control.
when the projector is turned off, the projector trigger unit detects no power consumption and sends a rf signal to the screen control unit exactly the same way you would have pressed the down button on the screen remote control.