The "TANLUX" brand is a factory specializing in emergency ligting and emergency exit sign for more than 10 years and has become one of the most popular brands in the US market. TANLUX brand will provide you with the best quality products and services. ?US STANDARD?This commercial exit sign made of Injection-molded thermoplastic material, UL-94V-0 flame retardant. Super bright with red letter EXIT LED emergency light are visible from up to 100 feet away and play an emergency warning role. ?EFFICIENT LONG-LASTING BATTERY LIFE?LED emergency exit sign lights built-in Ni-Cd 3.6V backup battery provides minimum 90 minutes of emergency operation during a power outage and safe for charging. 120V-277V AC universal voltage operation for wide places. ?EASY INSTALLATION?This exit sign with emergency lights with 3 mounting options: top mount, side mount and back mount (canopy included). Suitable for outdoor and indoor general places. The MOUNTING PARTS are packed in the Housing. Please open the emergency exit lights before installation. ?WIDE RANGE APPLICATION?This battery backup led exit lights with double face are widely use in bussiness facilities to provide illumination in different positions such as office buildings, exit doors or stairways in schools, churches, hospitals,canteen,commercial building and industrial building.