Some DVRs or dashcams allow an extra camera to be added as a second channel. By default, we show the maximum possible channels for each camera model. However, it’s not always clear if this second channel is actually connected or being used.

For example, take the JC400 model, which has both an external (main) and an internal camera. If only the external camera is being used, we’ll display buttons for both, even though the internal camera isn’t active.

In this case, we’d want to disable the visibility of the internal channel button and only keep the external one visible, to avoid confusion.