Using state-of-the-art technology, we've designed this strobe switch with a multi-purpose LED that has three very useful functions! First, it flashes several times when the light is turned on indicating a bulb pre-warming cycle that preserves bulb life; it acts as a power-on indicator; and, lastly, the LED will flash continuously when the battery is low and in need of charging. The new strobe flicker switch preserves battery life and is an irresistible attention getter of that old coon. Fits the Hot Lite Pro and Halogen Pro.