Solid state voltage limited charger|Brownout protection|Low voltage disconnect|Overload/short circuit protection|Test switch/power indicator light|3.6 VDC, 0.78 W DC long lasting LED heads|Universal face green letters|Sealed nickel cadmium battery|1.55/1.45 W input power|All components are injection molded, color stable, high impact thermoplastic material|Designer white textured finish standard|Components are of snap fit construction to facilitate under 5 min installations reinforcing ribs throughout to provide maximum strength|Molded-in wireways facilitate internal wire routing and connections|All components including battery and electronics are located inside the exit housing, snap fit canopy with captive mounting screws included with all exits|10 to 40 deg C operating temperature|60 Hz frequency rating|Long life LED lamps provide uniform diffused illumination|90 min battery runtime|Emergency exit combination light fixture