Alternating Flasher Circuit Board Only -- FL-2

A: It says it requires 10 to 18 Volts so 9v may not be enough. additionally, it is meant to connect to a detection device to trigger the flashing for crossbucks. I would think that if connected to a 9v battery whatever lights were hooked to it would alternately flash as long as power is connected. I am not sure what your intended use is but I don't think anything other than having two lights or two sets of lights flashing when power is supplied is going to work.