XKTTSUEERCRR 54LED & 18LED 3 Flahing Modes Vehicle Windshield Dash Deck Grille Strobe Flash Emergency Hazard Warning Strobe Light Bar (Amber & White) This product package includes 6 x 9led light blocks, 6 x 3led light blocks, 2 x control box with wires and mounting clips and screws. One set suitable for windshield/headliner placement and the other set suitable for grille placement on your car equipped with a 12 Volt DC power source. Easy to install. First, make sure where you want to place these lights; Second, make sure the 7.5ft wires is enough long for your arrangement; Third, you can drill holes to screw the ligths on your car, or use a superglue, then wire the positive ( + ) and ground ( - ) wires to a 12V power source. These high quality and professional grade products are perfect car emergency strobe warning light bars are perfect for police officers, first responders, fire fighters, law enforcement, construction workers or emergency workers, and other emergency needs. There are 3 flashing modes: 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. Mode B- Light blocks 1, 2, & 3 flashes once, followed by light blocks 4, 5, & 6 flashing once. Repeats continuously. Mode C- All 6 light blocks flash once simultaneously with a brief pause between each flash. Repeats continuously. 1 Year Warranty - 100% Satisfaction Guarantee from XKTTSUEERCRR. Please contact us without hesitation if there is any question.