Exitronix Wet Location NEMA 4X Polycarbonate Exit Combination NSF Rated Single Face Red Legend 12V 15W Black Finish Self Test Self Diagnostics Tamper Resistant Hardware (NXFC 1 R 12 15 BL CL G2 TRH) Tier7 Standard BL Wet Location LED Combo backorder1428 Standard BL Wet Location LED Combo Double Face Red Letters 6V 12W Gray Housing No Self Diagnostics Cold Weather Tamper Proof Hardware Heads (HLCWLEZU2G612G CW TP) Precise sensitivity adjustment Variable setting from 20% to 80% relative humidity so the fan works when the homeowner wants it to regardless of climate or season Run Time: 90 Minute emergency run time Warranty: Any component that fails due to a manufacturing defect is guaranteed for five years with a separate two year prorated warranty for sealed lead calcium batteries and five year prorated warranty for NiCad batteries