The K2 Meter is a basic tool every paranormal investigator needs in their arsenal. This is one of many devices used to measure EMF (electromagnetic fields). It is believed that a spirit either produces or disrupts the electromagnetic field. You need to be careful though because these devices can give a false positive if they come near electrical wiring, light fixtures, appliances, walkie-talkies, your phone, and any electronic equipment which also gives off EMF. Click the link to the right to buy a K2 Meter. This one is sold by a company out of St. Augustine, Florida, who we have purchased equipment from and can recommend.