Lighting Effects Circuit for Any Scale Smaller than any decoder at just .31′ x .31′ x .118′ and utilizing the industry′s smallest microcontroller and associated voltage control circuitry, the total module consumes less than 500 µa (1/2 ma). Typical peak operating current for these modules with LED(s) attached and running through full brightness curves range from 18-38 ma. This makes them ideally suited for operation when powered directly by a function output of any of today′s HO, N or Z-scale DCC decoders. Designed specifically to provide truly realistic lighting effects for 20ma LEDs, these modules include input protection against reverse polarity. Input voltage range 6-18 VDC. On-board current limiting resistor. Extra input wires included. LEDs sold separately. This unit simulates the eye-dazzling strobes used on various modern emergency vehicles such as ambulances, rescue vehicles, fire trucks and airport runway service vehicles. It′s configured to drive two series-wired red LED pairs that alternately strobe in rapid four-burst pulses, while a fifth white LED strobes 3 times independently during each complete cycle.WARNING: This product can expose you to chemicals including LEAD, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov