This Lionel Sound Activation Button is a must-have for model railroad enthusiasts. It is compatible with 3Rail O, American Flyer, and Railsounds systems. The button activates secondary sound effects and is perfect for enhancing the overall experience of your model railroad. The button is like new with a C-8 grading and is guaranteed to work flawlessly. The black color of the button makes it a great addition to any model railroad setup. Not only is it compatible with Lionel and American Flyer, but it can also be used with S scale systems. Add this Sound Activation Button to your collection and take your model railroad to the next level.