Chicago plenum rated (CCEA) new construction housing for use in insulated ceilings can be in direct contact with insulation. Air-tight 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)