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. For more information go to www.P65Warnings.ca.gov