The LED exit and emergency combo sign is built with injection-molded, engineering grade, 5VA flame retardant, high-impact, thermoplastic. It has adjustable long-lasting, efficient ultra-bright white LED lamp heads and a dual 120V/277 voltage standard. This sign can be wall mounted with the universal K/O pattern on the back plate or the EZ-snap thermoplastic mounting canopy can be used for top or end mount. This product is suitable for use in damp locations and has an operating temperature of 0C to 40C. These emergency lights and exit signs are best used in commercial or office spaces.