OmniGlow™ S.E.E.® System Batteries are not required to illuminate dark spaces! The S.E.E.® (SnapLight® Emergency Evacuation) System provides portable light sources without sparks, heat or flames, to ensure safe, calm evacuation. Place in critical areas near fire extinguishers, exits, stairwells and every 100 feet along designated evacuation routes for a safe, clearly lit path. Photoluminescent "glow-in-the-dark" panel is immediately visible, and the S.E.E.® System activates instantly at the pull of a handle. Remove one Lightstick for mobile use and leave the other as a stationary light source. Wall Unit includes 2 Lightsticks and 2 pins in easily mounted box. Refill Pack contains 2 replacement Lightsticks and 2 pins. Four year shelf life.