Details:
This is a Broadway Limited 1001 HO Scale Sidekick Two-Button Whistle & Bell Quantum Sound Activator for DC Layouts.
This accessory controller makes it easy to use and enjoy any Broadway Limited Imports engine on your DC layout. You can blow any horn/whistle signal simply by pressing and holding a button for as long as you want. And you can ring the bell with the touch of a separate button. The Sidekick can also be used to easily activate the Doppler effect for more realistic Sound. And programming your Broadway Limited Imports engines is also greatly simplified with the addition of Sidekick. Designed for use with your present DC power pack, the Sidekick is simply wired in line; complete instructions are included to make hook-up easy. And, its a great accessory to adapt power packs with electronic direction switches that delay too long to activate the bell function.