Micro-strobe Light * A Compact, Low-profile Flashing Strobe Light. Unit Featues A Polycarbonate Lens And Bright Two-joule (2.6 Watt/Sec) Flash. A Threaded Screw-on Lens With O-ring Seal Offers Water Resistant Performance. Lamp Meets Sae J1318 Class 3 Specifications When Used As The Primary Identification Lamp On Authorized Vehicles. Complete With Magnetic Base And A 12 Foot Coiled Cord That Plugs Into The Cigarette Lighter