The 12-watt power supply is designed for use with 1 to 3 numbers. The 24-watt power supply is designed for 4 or more numbers.
They can be connected to 100 to 265 volts AC using from 47/63Hz sources. The output is 12-volts dc.
The input and outputs are clearly marked on the supplies. The input is connected to the AC mains from the house. The output is connected as follows: Red (+12) connected to the gray wires on the characters and black (-12) connected to the white wires. The characters/numbers should never be connected directly to the AC power of the house.
The power supplies are IP67 waterproof rated.