The GeoPort and GeoBox are types of spirit boxes, but due to their unique differences, they are worth mentioning.

They are built by Ohio-based paranormal inventor George Brown, who retrofits his paranormal technology into original antique wooden radio cabinets. The device monitors three different types of input: EMF, vibrational waves, and radio frequency.

The radio frequency element of the device is easy enough to understand, as the two devices rely on the same principle as a spirit box. In the case of the geo-devices, you plug a modified radio into a standard 3.5mm audio jack input, which provides the radio frequency input. The boxes also have Bluetooth built in, which allows you to connect a smart phone running ITC apps.

The EMF element of the devices' input refers to a specific range of the electromagnetic spectrum, the frequencies picked up by EMF meters like the popular ghost hunting gadget, the K-II.

The radio and...