LAMPHUS SnakeEye II SEHA14 LED Hideaway Strobe Warning Lights [SAE Class 3] [33 Modes] [4 Watt] [Weatherproof] Flashing Lights for Police & Firefighter Emergency Vehicles - Red User Manual available for download under Product Information Details Search "Lamphus CRLH06" on YouTube for Product Video Each unit consists of 4 generation 3.5 high intensity LEDs with 33 selectable flash combinations, sync-able between multiple units. Light assembly and surface mounting capabilities. Water, vibration, and corrosion resistant.; Black & Silver flange Included.