Features:Interchangeable / Compatible with: All automobiles and devices equipped with a 12V power source.Flash Mode A- Light blocks 1， 2， & 3 flashes rapidly for 8 times， followed by light blocks 4， 5， & 6 flashing rapidly for 8 times. Repeats continuously.Flash Mode B- Light blocks 1， 2， & 3 flashes once， followed by light blocks 4， 5， & 6 flashing once. Repeats continuously.Flash Mode C- All 6 light blocks flash once simultaneously with a brief pause between each flash. Repeats continuously.Extremely low power consumption rate.Super bright LEDs.30，000+ hours of lifespan.Each light block (9 LED light bulbs) is 1.75" (inches) long.Completely waterproof..Package included:6 x light bocks with brackets(6 Green lights)6 x 8 feet extension wires1 x set of mounting clips and screws1 x control box with 3 flash modesEasy to operate without Manual