Dual Voltage 120/277 VAC, 60 Hz | Energy Consumption of less than 2 watt * Extra face plate included(Double face) | Ceiling/back/side mountable(easy snap-fit canopy included) * Battery Backup | Completely self-contained | Fully automatic operation * Injection-molded, V-5 flame retardant, high impact, thermoplastic housing | LED indicator light * ETL listed w/ damp location | Chevron arrow-pop out(UL924) | Compact, low voltage disconnected (LVD)