The K-Line camera car does have sound. This camera is a version of the X-10 series of wireless cameras that were populalr some time ago. Do a search for X-10. The problem with the sound is that the receiver furnished with the camera does not have the sound cercuits. If you got a regular X-10 receiver with the sound you would find the sound available. Again you get a lot of track noise so you don't get much but the sound capability is there.
Other problems come from dirty track. The unit does not have much standby time so any time it looses power momentarily the picture goes out.
All things considered it works very well.
Al
