Geiger Counter Nuclear Radiation Detector - Portable Handheld Radiation Dosimeter Rechargeable Radiation Monitor Meter geiger Counter beta Gamma X-ray Tester Radioactive Detector β Y X-ray Detection

It's a good product, I see I may need this one day to measure radation.

I set this detector on a table, plugged in, to detect background radiation. It froze up after a week and failed to function any further. There doesn't seem to be a way to reset it.

Fake measurement reading, battery dead after a few days. Useless graph.

The device work's ok but it gives you a warning when the electric field is at 40vm which is pretty pointless when the human body can be upto a constant 5000vm. It's nothing but a device which can cause anxiety and frighten people with it's description.