Features loud, pleasant audible sound. Flashes at a rate of 60 to 120 FPM, with first flash less than 1.5 seconds after startup. Bi-polar flasher functions continuously at 13v for 36 hours with 10-32 CP lamps, 20 AMP max. Uses standard 1/4" male blade terminals. Features double coil relay with electronic components. Replaces Truck-Lite 97202/03/04 series.