The ZOMS-TR12V wireless 12-volt projector trigger is a small device that coordinates your Yard Master Electric outdoor projection screen with the projector and no wires are required. It plugs into a projector's "trigger output" port. When the projector powers on, the wireless 12-volt trigger acts as a radio-frequency wireless remote and brings down the projection screen into the "open" position. When the projector powers off, the trigger commands the screen to retract back into its casing. Features Small plug-in device is easy to set up and synchronize to Yard Master Electric Series Control distance up to 49 feet (15 Meters) Projector Output Support Voltage: 11-15 volts Control Type: ASK (Amplitude Shift Keying) Compatible only with Yard Master Electric Series Compatible with any projector that has a mini mono jack 12 volt trigger output port Product Dimensions: Dimensions: 2.6" (L) x 1.4" (W) x 0.63" (H) Weight: 13 grams