Operation is simple: select the receiver number you wish to activate, enter it on the keypad and press the “REC#” key (you can control up to 199 different receivers from one transmitter). Then, select an output to activate, enter it on the keypad and press the “ON” key. The transmitter will immediately send an “ON” transmission to the receiver, changing the state of the selected receiver output from 0 VDC to 12 VDC @ 1 amp. The receiver output can be used to activate a relay, solenoid, light, PLC, etc. Immediately after pressing the “OFF” key, the transmitter will send an “OFF” transmission to the receiver, changing the state of the selected output from 12 VDC to 0 VDC and turning off the connected device. Solar Panel Kits: Turnkey, 12 VDC solar panel kits are available for locations without electricity.