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I don't know anything about that device but wiring a switch accross the pushbutton is easy, just connect the switch to the pushbutton contacts. ITTC makes a number of small sound units designed for model railroading. These are intented to be used on the layout not in rolling stock. <br /> <br />I have used these with DCC to add whistle and bell sounds in an S gauge tender for a friend. They are about $20 each and come in a varity of sounds. They will run continusly if you keep the contact closed. <br />Ken
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