Product Description? Easy 2-wire installation, regardless of voltage ? If the strobe light is being powered by a backup battery, as the battery is drained, the strobe light will continue to function ? Perfect for informative household burglar alarm use ? Incorrect polarity cannot damage circuit or draw current ? Low current consumption with long operating lifespan of over 300 continuous hours (2,000,000 flashes) ? Lens is made of high-impact resistant acrylic; case is made of high-impact resistant acrylic ? Choice of amber, blue, clear, green, or red lens