The OEM Tatco LED Exit Sign with Battery Back-Up TCO07230 is designed to automatically activate during power outages, providing up to 90 minutes of emergency operation. This energy-saving LED light has a lifespan of up to 25 years, ensuring long-term reliability. It features a sealed maintenance-free battery with a fully automatic charger that lasts up to 10 years. Constructed from rugged polycarbonate, it includes front and rear stencils with snap-out directionals and offers dual-voltage operation at 120/277 volts.