GQ GMC-300S Digital Nuclear Radiation Detector Monitor Meter Geiger Counter Radiation Dosimeter

Exactly as described and well worth the price. I've tested this against some known elements in my collection and the counter works well. The interface is intuitive and easy to navigate to change various settings and customize the display.I chose this as an economical option that would still allow me to have audible and visual queues. The ability to view the data (including as a graph) and export it is appreciated, as is having a quick tool for the standard conversions and equivalent metrics of Sieverts, Rads, CPM and dose etc.Would also note the battery came charged and has held up well for hours now. I look forward to taking this on my upcoming trips to the odd mineral shop or planned conventions.Don't look at other cheaper options on Amazon from xyz brands and vendors... This product has the quality you are really looking for.

I like it, it has all the base functions. I am near a military base, so it's always nice to have peace of mind. The clicking can be a little ominous when the device is getting a reading, but I have yet to see it go over 28 CPM. Also it came with a rechargeable battery which is nice, and I've had the device on for 24 hours solid, and the battery indicator still shows 100%. Great buy so far!!

I got this to monitor the radiation during and after my RAI therapy. For the most part, it seems accurate. The first 24 hrs of my RAI, the radiation from my neck area was off the charts. It was interesting to see but also scary. I used it as a way to determine the distance to keep myself far enough during isolation. As the radiation decays, the distance you radiate becomes less too. I also used it to monitor the radiation from my pillow. I have a favorite pillow and the neck area was still high in radiation. It took about a month and a half for the radiation to come back down to normal levels. Even the pillow cover was still high in radiation too. Having this tool really helped ease my worries about radiation and affecting those around me. It was well worth it. Hopefully I don't have to go thru that again. For those that do go thru something like RAI, this tool is helpful and I wish you a speedy recovery.

Not sure why companies just put such low effort into their descriptions but no where does it say why kind of battery this uses. When I received it I noticed its a special 14500 lithium cell. Its AA sized but I tried a regular AA and it will not work. It needs the higher voltage of the 14500 battery. I do really like that at least the battery is removable. That is important for long term storage so there is not parasitic power drain as most devices have. I think if we;re using a 14500 why not just use an 18650 and that would at least be something more common for preppers and much monger battery life. If using AA sized batteries like a 14500 it should be compatible with 1.5V common AA at least but its not!The GMC-300S itself is really nice, I like the display and user interface, the options for display backlight levels and timeout, speaker LED indication ON/OFF, alarm threshold and many other options are great to set up how you want. Overall happy with this unit for the price. I will begrudgingly get another 14500 battery to have a spare.

I've worked in a facility that handles waste products that all have some level of radioactive contamination, so I am well familiar with Geiger counters. It appears to work well with a degree of accuracy. The manual is easy to understand and the functionality of the instrument and basic setup was straightforward. I like the fact that it has a built-in rechargeable battery, and a full charge will give several hours of operation.Hopefully, I will never absolutely need to use it, but in these times it was quite inexpensive and offers much mental comfort.

Cheap, and seems to reasonably respond to my radioactive ore samples.

Perfect for finding radioactive glass, very readable and i love all of the other readable modes it offers. I was honestly suprised by the amount of settings and the quality for its money. Easy to put in my pocket and really nice for incase oneday i need to play irl fallout (you never know)

works really well,