This is the brand used by the CRIRAD, I could measure radioactivity in me, and I am reassured, I am at a minimum. There is a French manual supplied, but the device simply works. We turn it on by pressing and holding the large button. To turn it off, it reconsolidates above. It takes a series of measures and displays the As the microseconds / h with the correction related to the successive measurements. In the leaflet, there are also different levels of radioactivity, really normal to alert threshold which allows much reassurance. Nothing wrong so good device and affordable.
