89409a-1 46 LED Strobe Light Bar W/adjustable Flasher Amber Strobe Tube One 15 inch 46 LED Strobe Light Bar with Adjustable Flasher Total length of tube, including mounting brackets, is 15 inches. It has an adjustable flasher on the 6 foot wire, which turns on, off, or flashes 2-20 flashes /second. Comes with instructions, suction cups and screws. You can connect several together and then attach one cigarette plug or just hardwire one to a 12 volt power supply. Comes with suction cups to mount on windows. Hardwire to any 12 volt power source or attach a cigarette plug to the end. Installation: HOW DO YOU MOUNT THESE? Bracket ends swivels 360 degrees and has screw holes on the end, so you can screw them on the back of your rear deck or against the ceiling