For sale is a National Electric Gate Electronic Railroad Crossing Bell. It is functional, and loud. Required voltage is 12 volts, AC or DC. There are paint blemishes in some areas, but this does not affect functionality. This bell can mount onto a 4 or 5 inch diameter pole. The two contacts shown are non-polarity sensitive, meaning placement of positive and negative wires does not matter; either way will work. The bell is volume adjustable using the screw shown in the pictures.