The (original) Q3 Meter
The Q3 Meter scans the surrounding area for EMI using active UHF scanning covering the 2.402 to 2.485 gigahertz spectrum. Unlike traditional EMF detectors, the Q3 Meter only uses Bluetooth to detect activity by way of disruption and defaults to Circuitry Disruption when no radio device is detected. But the results are quite similar.
Personally the GHA team feels the Q3 Meter operates on another spectrum and provides additional never before detected responses from the environment. Bluetooth is used to scan the UHF, and when not in use the app defaults to Circuitry Disruption caused by Electromagnetic Interference via (hardware analysis).
At first I was skeptical, but now I'm a believer. The Q3 Meter is more powerful than my K2 and has helped me find spirits.
(★★★★★) Alex Alvarez / Wichitaw Wizard Paranormal Crew, Kansas