Highly Effective, Ultra Slim Warning Light MicroPulse Ultra models have a low-profile design that offers a broader range of mounting options suitable for external and internal mounting applications. The advanced high-output LED light head can be programmed to operate as a single unit or synchronize with multiple light heads. Built-in flash patterns enable multiple vehicle perimeter lights to be either synchronized in the same pattern or in opposite sequence. Built to Stand Up to the Most Punishing Conditions MicroPulse Ultra lens is made of US resistant polycarbonate to protect against harsh conditions. Models include a fully encapsulated water-proof housing, which provides a barrier against moisture and condensation. All MicroPulse Ultra perimeter lights are backed by Federal Signal's five-year warranty.