The Projecta All-in-One Control Box offers multiple operation options in a single box.This new accessory can be combined with motorized projection screens without a built-in RF receiver and offers the following options:- Dry-contact (relay)- RF (radiofrequency) control- IR (infrared) control- Manual Switch on the box- 12 volt triggerRelay (dry-contact)Use the relay dry contact points in the control box to connect the screen to be operated with a third party control system. A control system includes the projection screen into the full room AV control.RF (radiofrequency) controlControl the projection screen via a radio frequency remote control. The remote control unit operates on frequency 433.92 MHz. RF has an effective range up to 30 meters. depending on the local environment.IR (infrared)Control the projection screen via an infrared remote control. For infrared control a direct line of sight with the control box is needed. IR can be a solution for environments with restricted RF acces