The Emergency Rescue Mirror is both a DAY and NIGHT signal mirror that has a special two sided reflective surface. The silver mirror side is used as a daytime signal mirror by reflecting the sun's rays to a distant point. The opposite side is a specially enhanced red mirror optically designed to reflect light sources at night, to better attract rescue teams. Moving a flashlight side to side across the red surface simulates a flashing beacon or ultra bright flare seen up to 3 miles away. When disaster strikes, this tool could be the difference between being found or not, and is a must have for all survival kits. Day or night signaling. Includes lanyard and secure protective pouch. Salt and corrosion resistant. Size 3.25x2.25. Weight 1 oz.