Perfect basics for any level of paranormal investigating experience..
Investigators place devices anywhere from a floor, doorway, bench etc and ask questions, interpreting flashes as spirit responses, similar to an EMF meter
"Intelligent" Responses: Some investigators use multiple balls, hoping spirits will trigger specific ones for clearer communication, you can use them next to each other for a yes or no response
These are very easy to use and one of the most popular items to use when ghost hunting
We use both of these items along with a spiritbox and K2 every investigation we go on