The power supply for LED backlit numbers is designed to power and connect your LED numbers together. This cable is not intended for address plaques, only use this cable when doing the installation type C, which consists of installing the numbers directly on the exterior wall/outdoor siding (brick, stone, wood, or any other surface). It features a fast connection system, simply press and connect the low-voltage wires into the connection board. Then, plug the other extremity into a wall outlet inside the house (120 Volt). You can power up to 6 LED backlit numbers. Important: LED backlit numbers sold separately Made for wall mount installation Install the numbers directly on the exterior wall Power up to 6 LED numbers Easy to install 120 V: indoor wall outlet This product is ETL certified by Intertek PRO-DF Power Supply for LED Backlit Number – 120 Volt.