The DigitMX wireless RF trigger for electric motorized projection screens will lower your screen automatically when your projector is switched on. When you turn your projector off the AC Wireless projection screen trigger will automatically raise your screen back up. This great gadget negates the need to have a separate projector remote for your electric projection screen. Simply add the compact RF trigger unit in between your mains power outlet and your projector and when the power is switched on the RF trigger will automatically send a signal to the RF receiver built into your projector scre