PRODUCT OVERVIEWPrecision molded industrial fiberglass New York Approved LED Exit sign to be used in wet or hazardous environments. Perfect for food processing plants, outdoor stadiums, or wash down areas. The unit door is crystal clear acrylic attached to the housing with 4 weatherproof screws, and is fully gasketed. The 4X Series provides bright even legend illumination, during both normal AC-ON and through battery backup upon utility failure.LISTING/CODE COMPLIANCEUL 924 listed Life Safety NFPA 101, NEC/OSHA NYC MEA/BEC, Local Laws 16 & 41.ELECTRICALDual voltage input, 120/277 VAC. Contact factory for other voltages. Line latching. Constant current solid state voltage limited charger. Solid state transfer switching. Circuit design includes brownout protection, low voltage battery disconnect, and short circuit protection. Includes sealed momentary test switch and AC-ON visual indicatorHOUSINGWatertight and corrosion resistant fiberglass, UL wet location listed. Industrial grey finish, front lens is crystal clear acrylic. Front cover is fully gasketed. All electronic components including Nickel Cadmium batteries are prewired and assembled onto internal wireway chassis. Minimal installation wiring is needed.BATTERYSealed, maintenance free Nickel Cadmium. For use in high temperature environments. The battery is protected from deep discharge by a low volt age disconnect circuit. 90 minutes minimum discharge.LED LAMPSUltra high brightness Aluminum Gallium Phosphate (AllnGaP) LEDs. Both AC and Battery operation utilize the same set of LEDs. Brightness increases during battery operation.WARRANTYBattery, 15 year pro-rata. LED lamps, 25 years Charger board, 5 years.DIMENSIONSHeight=11 3/8" Length=11 3/4" Depth=6 3/4"COMBO DIMENSIONS= Height=15 1/4" w/lights, Length=14 3/8", Depth=4" Surface Mounting