Shop Nilight 14.5″ 30LED Strobe Light Bar Double Side Rooftop Emergency Flashing Lights Amber White Safety Warning Hazard Light Bars with Magnetic Base for Construction Vehicles Plow Trucks Pickupin high quality,support 2-year warranty.Dual switch button setting, 20 mode power supply options, including steady, pulse, alternating. You can conveniently turn on/off or select the flash mode via the cigarette plug button. Carry over the last used mode recall/memory function.