Trackside Digital Sound Device -- Rail Car Engine

This complete sound system includes a train-actuated trigger switch, a 2" speaker for mounting under the layout or in a structure, and a speaker amplification box. Speaker may be replaced with a 1" speaker for on-board use in HO equipment (speaker sold separately). System operates on 9V. Bring your rail car alive with sound synchronized to speed, adjustable idle and max RPM. Compact system is easy to install and the included 2" speaker is easily replaced with a 1" (sold separately). Powered by 9V battery.