Package Includes: Ready-made board 12V, 40A Relay 5 Leds of different color of 3mm size 5 two pins RMC wires 1 four pin RMC wire for sensor Mandatory Requirements: You will need two magnetic float switches (normally open type) or 2 SS metal sensors and one dry run sensor. Transformer to be used: 0 -12V or 0 – 15V or 0-18v or 7.5 – 0 – 7.5V or 9-0-9v, 1A Board Size: Approx. 9.5 x 6.5 cm