Tripatini contributor Fyllis Hockman writes:

"At the beginning of our tour, Brian, our guide and historic/haunted/site veteran, passed out electromagnetic field transmitters to aid in our search for otherwise unrecognizable companions; supposedly their energy is recorded on the readers, which tend to beep loudly in response. Or it could just mean that there’s a computer nearby. Hard to tell."

Read more in her post Hailing Halloween on Spooky Ghost Tours in St. Augustine, Florida.