Functionality The LEDT series exit sign is designed with a universal transformer that work with 120-277V. Features a 1.2V 1000mAh Ni-MH battery that provides battery backup for 90 minutes. Operational temperature 32°F to 104°F. The Thinnest UL Approved Exit Sign A thin, low profile Exit Sign with standard Red LED letters. If you're looking for an exit lighting solution that doesn't take over your decor, this is the sign for you. This sign still meets all the same requirements and listings as a standard unit and can be used almost anywhere! This exit sign operates on either 120 or 277 VAC. UL 924, NEC and NFPA 101 Life Safety Code Less Than 2" Thick Rated for Damp Locations Knock-out left/right arrows Features Dimensions W: 11.96" H: 7.59" D: 1.02" Installation The LEDT is suitable for surface wall, side, and top mounting via included canopy. Snap together design allows for quick and easy installation. Knock-out chevrons for customized egress signage. The LEDT exit sign can be installed in damp location areas. Construction The LEDT series is constructed from injection-molded, high-impact, engineering-grade, UV-stabilized, UL 94 V-0 thermoplastic. White housing is standard. Emergency Operation Upon failure of the normal utility power, an internal solid-state transfer switch automatically provides uninterrupted emergency operation for at least 90 minutes. The fully automatic solid-state, two-rate charger initiates recharging a discharged battery within 24 hours.