LAMPHUS SnakeEye II SEHA16 LED Hideaway Strobe Warning Lights [SAE Class 3] [72 Modes] [6 Watt] [Weatherproof] Flashing Lights for Police & Firefighter Emergency Vehicles - White/White User Manual available for download under Product Information Details Search "Lamphus CRLH06" on YouTube for Product Video Compliant with SAE J595 JAN05 Class III (Amber/Blue/Red/White) Certification Each unit consists of 6 generation 3.5 high intensity LEDs; 72 selectable flash combinations, sync-able between multiple units. Water, vibration, and corrosion resistant.; Black & Silver flange Included.