Die cast aluminum EXIT-EM combination unit. Designed for wall mount only. Utilizes (2) high-efficiency 1W LED emergency heads; consult factory for additional lamp options. Lead-Calcium battery is standard, and provides a minimum of 90 minutes of illumination in emergency mode. Nickel Cadmium battery offered as an option. Meets UL 924, NFPA 101, NEC and OSHA illumination standards. 5-year warranty on housing and electronics.