Bests & Worsts Reviews from Amazon

I bought this item as a curiosity and to write a review piece online and it has definitely served that purpose. It also was a nice hardware reverse engineering challenge to see if I could extract firmware from it, which I was able to easily do. From what I was able to gather upon tearing down the device (which obviously the people who buy this product don't have knowledge of electronic components/systems) think of it as a crystal AM radio kit with bad patch antenna that is amplified with a bunch of audio grade amplifiers and fed into an analog-to-digital converter on a microcontroller (MSP430 in this case) and then the measurement is then converted to some number and displayed on the LCD. I have many issues with this device claiming to be capable of measuring the specifications that are claimed. Especially the frequency range, specifically that 6GHz number... Yea you see any test equipment that claims that high frequency performance typically (with names like Keysight, Tektronix, Teledyne-Lecroy, etc) cost in excess of $1,000's and some in the $10,000's. So this device (Trifield TF2), is a scam that relies on the exploitation of people who fear technology and falsely believe that the tech is causing them ill effects... and also think that all RF is like nuclear radiation, which it is most definitely not. So basically this becomes the "confirmation-bias" meter that they can point to what they think the offending device and say "see it's that", when in reality they're seeing a signal amplified non-linearly anywhere from x100 - x10000 times its actual power level and then are falsely led to believe that they're health condition is not caused by other environmental factors and/or other underlying health problems. I'm sorry to tell you that you're more likely to get skin cancer from the Sun and if unchecked that will metastasize to the brain (Yea you're more likely to get brain tumors from the sun than RF from your devices). In conclusion, this was a fun experience and gave me closure that this whole device is scam and I feel validated as an engineer that works with RF and plays with $100,000 RF test equipment that can actually measure what this claims to measure.