Global Combo LED Emergency Exit Sign, Red Letters w/ Battery Backup, Ceiling & Wall MountIntended Use:Ideal for applications requiring attractive unit equipment with quick installation of general-purpose emergency lighting and exit directions. Includes directional chevron knock-out inserts on sides. Provides a minimum of 90 minutes of illumination upon loss of AC power in offices, schools, restaurants and warehouses. Listings:UL & cUL Listed. Meets UL924. Meets NFPA 101, NEC and OSHA requirements. Listed for use in damp locations. Construction: White, low-profile contemporary design. Engineering-grade thermoplastic housing is flame retardant, impact-resistant, scratch-resistant, corrosion-proof and resists dirt, dust and moisture. UV-stable resin resists discoloration from natural and man-made light sources. Fully assembled single-face combo comes with extra faceplate for double sided signaling option. Optics:Two- 12w LED lamp heads with 12 series-parallel white LEDs each. Track and swivel arrangement permits full range of lamp adjustment. Typical LED lamp life is 10 years. Battery:Sealed, maintenance-free, 9.6V nickel-cadmium battery backup delivers 90 minute capacity to emergency lamps. Constant-current charge maximizes battery life and automatically recharges after battery discharge. Electrical:Multi-volt input capability (120/277V). Provides low operating costs. Short-circuit protection - current-limiting charger circuitry protects printed circuit board from shorts. Test switch and status indicator for visual and manual means of monitoring system. Mounting:Universal mounting plate and J-box pattern for easy installation. Tool-less access for maintenance. Wall or ceiling mounted.1 Year Limited Warranty