1 x crossing signal circuit board flasher Alternately dimmer blink rate adjuster

Price is for 1 pcsCircuit Board flasher with dimmer and flashing rate adjustermake the LED crossing signals flash Alternately    when power on, the 2 lights or 4 lights will flash alternatively    crossing signals NOT included   Functions: when manually power on, the 2 lights will flash alternatively( suitable for LEDs made common anode crossing signals)or May use it with the following controller and turn on your crossing signals automatically when the trains come.         Click here to view the videoPRODUCT  DESCRIPTION wide input power range: 3V to 5V DC (2...