*One set suitable for windshield/headliner placement and the other suitable for grille placement(See product images).
*Easy to install, Just need to wire the positive ( + ) and ground ( - ) to a 12V power source and connect each LED bar to the controller.
*High Quality, Professional Grade products, weatherproof and long lifespan over 50,000 hours.
*Suitable for emergency workers, postal service, construction vehicle,security, law enforcement, hazard warning, towing, and emergency needs, etc.
*There are 3 flashing modes: A:Flash one kind of color 8 times and switches off to the other; B:Flash one kind of color once and cycle between the two; C:All LEDs flash several times.