The mains transmitter sends a wireless signal to switching actuators / receivers when the switched input is closed or open (turn ON or OFF). The transmitter pairs with function 1 of the actuator receiver. Whilst the switch input is closed the signal will continue to be sent every 10 minutes keeping the actuator/receiver turned ON. Once the switched input is opened the transmitter will send the signal to turn OFF the actuator/receiver. The programming is performed by using the button ‘PROG’ which also acts as a manual override. The status of the device is signalled by two LED diodes on the front panel. Perfect solution for where a permanent connection is required, e.g. thermostat to boilers, PIR to external lighting etc.