This device combines magnetic and electric readings in one package for fast and accurate measurements. It has been adapted for paranormal research for several years and can be used by hand in taking readings of locations. In addition, this newly upgraded device is more sensitive than ever before! Features a continuous analog reading and a much higher sensitivity than ordinary meters… much easier to use than other Tri-Field Meters, it also features the options to have it upgraded by the manufacturer to include a light and audio signal. Highly recommended for the beginning ghost hunter over cheaper meters!