Wolo (3710M-R) Priority 2 Strobe Emergency Warning Mini Light Bar - Amber Lens, Magnet Mount Red lens, Magnet mount Two powerful strobe lights that produce 16 joules Each strobe light double flashes 80 times per minute and is built with a diagonal mirror between the lights for greater visibility The lens is constructed of strong polycarbonate and is replaceable, each strobe light has an internal Fresnel lens to magnify the light greater distances The electronics are proven state-of-the-art to provide the user maintenance free reliable service