What are 2 tools that ghost hunters use and how do they use electromagnetic waves?

Ghost hunters often use EMF (electromagnetic field) meters and spirit boxes in their investigations. EMF meters detect fluctuations in electromagnetic fields, which some believe may indicate the presence of paranormal activity, as spirits are thought to manipulate these fields. Spirit boxes scan radio frequencies to capture electronic voice phenomena (EVP), allowing potential communication with spirits through the sounds and voices that emerge from the static. Both tools rely on the idea that ghosts can interact with or influence electromagnetic waves.