Commercial Door Operator Safety Photo Eye System, Sensing Range (Ft.) 45 ft, NEMA Rating 4, Standards UL325, Volts Range Max. AC 24, For Use With 2TRN1, 2TRN2, 2TRN3, 2TRN4, 2TRN5, 2TRN6, 4GY87, 4UKX6, 4UKX7, 6UR99, Includes Bell Wire, Mounting Brackets, Photo Eyes, 1 Pair