1 x sound effect board for grade crossing signal clang bell tinkle w/ speaker

Price is for 1 boardadd sound effect to your crossing signals when they flash Alternately                                            click to listen  sound effect #1click to listen  sound effect #2click to listen  sound effect #3click to listen  sound effect #4click to listen  sound effect #5    Functions:  the sound effect board plays a continuous loop grade crossing bell sound when powered on, either manually or by a Grade Crossing signal controller, until powered off. or May use i...