Chicago plenum rated (CCEA) new construction housing for use in insulated ceilings can be in direct contact with insulation. Airtight construction provides energy savings by reducing the flow of air through the ceiling. Patented design allows for easy, tool-less removal of the driver. Input Voltage: 120-277V Wattage: 12W Dimming: Phase (Triac or ELV) or 0-10V Ceiling Thickness: Up to 0.5in. Extension collar accessory for ceilings up to 2", ordered separately (NIO-2EXTC2) Compatible Trims: NIO-2RTLA, NIO-2RTLNDC, NIOB-2RC, NIOB-2RG, NIOB-2RNB, NIOB-2RNDC, NIOB-2RPH, NIOB-2RPHA, NIOB-2RSL, NIOB-2SC, NIOB-2SG, NIOB-2SNB, NIOB-2SNDC, NIOB-2SNDSQ, NIOP-2RCY, NIOP-2RTC Listing: cULus Listed for Damp Locations (Wet locations when used with compatible trim)