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)