Line voltage power supply to control low voltage ceiling sensors. •120 or 277 input voltage, 15 - 24 DC output voltage. •1/2 inch nipple for mounting in a standard electrical box. •Can control up to 14 low voltage sensors. •Handles up to 20 amps of load. •Will control only one circuit. Inquire about 2 pole relays & slave relays for multiple circiuts. •5 year warranty. Made in the U.S.A.