REM-Pod & Paranormal Static Detection Devices

A stuffed teddy bear with a built in ghost-detecting REM-Pod is a commonly used tool during paranormal investigations, it acts as an electronic trigger object.

Is it possible that a ghost could trigger a REM-Pod and what else might cause the paranormal detection tool to go off or give a false positive?

To get a feel for how reliable a Mel Meter is on a paranormal investigation, we put it through its paces in a controlled environment to see how accurate its sensors are.

There are plenty of ghost hunting gadgets around, the REM-Pod is just one of them and it's not the cheapest but is it worth the money? How exactly does it work and is it reliable?