nLight, NPP16 EFP, Power/Relay Pack, Standard, Series: nPP16, 120/277 V AC Input, 120/277 V AC Output, 50/60 Hz Frequency, 40 mA, 14 to 122 deg F Operating, Up to 90% Non-Condensing Humidity, 0 to 10 VDC Dimming/Auto ON Control Input, 2.283 in Width, 1.83 in Depth, 4.015 in Height, Plastic, White