54 x Ultra Bright Blue LED Emergency Warning Use Flashing Strobe Lights Bar For Windshield Dash Grille: Automotive. Normal Speed: Flash 1 time then switch 1 time, 3. This is the perfect item for tow trucks, law enforcement, police, firefighter, EMS, ambulance, private security, or escort service. They are universal fit for all models of vehicles, and they are perfect for mounting in the interior, front grille, roof top, windshield, dash, and deck. They are perfect for towing, warning, caution, hazard, and emergency use. The control box that comes with this set has 3 flash modes, 1. Very Fast Speed: 8 times then switch 8 times, 2. Normal Speed: Flash together 1 time, off, flash together again.