Exlight 36 X Ultra Bright Blue LED Emergency Warning Use Flashing Strobe Lights Bar for Windshield Dash Grill Budget friendly strobe light set suitable for all vehicles with a 12VDC battery. Set includes 4 LED light bars with bracket, controller module, 2 bundles of extension wire, and mounting accessories Slim design minimizes the obstruction of view while giving off a low profile look. INSTALLATION: Connect each LED bar into extension cable, and connect the other end of the extention cable into the sockets on the controller. Wire the controller's black (- ground) and red (+ power) into the car's power source. Place lights at the desired location. Zone Tech Brand is known worldwide with superior product quality and service