RailPro RPRAKS-1 G Scale Analog Sound Kit
This
item will add sound to your Analog Locomotives - after you install, just put the
locomotive on the track and turn on your power supply and you have
sound. This system runs just like Phoenix Sound.
The
RPRAKS-1 kit includes all the necessary electronics to add sound, motor
and light control to your Analog Locomotive and can be controlled on
your analog (DC) power supply. It also has a magnet pickup so you can
place magnets (2 included) on your track to trigger a bell or whistle.