Ideal for powering multiple signs, 502-4802 & 4803 plug directly into the board and the #502-4804 converter module hooks into the red and black terminals. Powers up to 10 signs and includes instructions and mounting hardware. Measures: 4-7/16 x 2-1/4′WARNING: This product can expose you to chemicals including Diethylhexl Phthalates, which is known to the State of California to cause cancer and birth defects or other reproductive harm.