Emergi-lite ES Series pictogram exit signs. The equipment shall operate with universal 2-wire AC input voltage of 120 - 347 VAC at less than 2.5 W and universal 2-wire DC input voltage from 6 - 24 VDC at 1 W consumption for single and double face signs. The sign shall be suitable for wall, end, or ceiling mount. The frame and back plate shall each be of a one-piece steel construction. The faceplate(s) shall be constructed of robust clear poly-carbonate panels with an opaque border colored factory-white. Each face plate shall come standard with two legend films for pictogram and directional indicators. The light source shall be white light-emitting diodes (LED) and shall provide even illumination in normal and emergency operation. The pictogram exit sign in a self-powered configuration shall use a sealed Nickel-Cadmium battery of 2.4 V nominal voltage and shall stay illuminated during emergency operation for at least two hours upon AC failure. Metal construction using Canadian cold-rolled steel Based on a modular design, this product comes pre-assembled for quick, easy installation Long-life white LED light source Supplied standard with two pictogram films per face, for direction selection Two-wire universal AC input 120 - 347 VAC, two wire standard DC input 6 - 24 VDC