WIDE APPLICATIONThis rooftop strobe light bar is a great choice for firefighters, snow plowing, safety warning, emergency vehicles, utility workers, postal service, construction vehicles, etc. Note the magnetic base does not apply to aluminum body vehicles. UPGRADE 16.5 INCH SIZEThe rooftop strobe light bar has a total of 56 highintensity leds, And TIR optic lenses offers a super bright light output. 200 brighter than a standard LED strobe light, bright enough to be seen more than 2000ft in distance. It is even visible during daytime conditions, Brighter and more effective than standard LED strobe lights. 20 FLASHING PATTERNSDouble switch buttons setting, 20 Patterns to choose from, including 3 traffic modes, You can switch ONOFF or select the flashing mode conveniently at the cigarette lighter plug buttons. Last used pattern recallmemory function. Whether you need a steady light, fast strobes, alternating patterns, or synchronized flashes, this hazard caution light bar has you covered. 20 HEAVYDUTY MAGNETSThe lightbar easily attaches to any metal rooftop using the 204*5 strong magnetic feet with rubber padding, without hurting the roof of your vehicles Test go up to 80mph but not fall off. 9.8ft cigarette lighter adapter cable and 9.1 controller cable, long enough to install the light anywhere in the vehicles. WATERPROOF GRADE IP68The Emergency Warning LED Strobe Light Bar is made of high quality ABS material rugged sleek frame sealed weatherproof build, Professionalgrade design, waterproof with IP68, over 50,000 hours life span. Great to use in rain, fog, dust, and snow weather, resisting moisture and vibration, escorting your driving.