Auxiliary Relay Compatible with Series Hubbell CU Lighting Technology Fluorescent Incandescent Communication Method Hard Wired Input Voltage 24V DC Output Voltage 24V DC Compatible with Brand Hubbell Wiring Includes Add-A-Relay H-Moss System Lighting Controls Switches Standards ASHRAE 90.1 cULus Listed Overall Depth 3.69 in Overall Height 1.36 in Overall Width 2.33 in Maximum Operating Temperature 104 Degrees F Minimum Operating Temperature 32 Degrees F Color Black