Now that's a toy you don't stumble across very often! Not sure what I'd do with it, but others may have a use: https://www.radiacode.com/
Radiacode – Portable Radiation Detector, Dosimeter & Spectrometer

Radiacode is a fast, portable radiation detector, dosimeter, and spectrometer with real-time analysis. 20× faster than Geiger counters, it identifies isotopes, tests food for contamination, and supports research and safety.

@cstross NYC considered (but didn't enact) a ban on private radiation detectors: https://www.cs.columbia.edu/~smb/blog/2008-01/2008-01-09.html. Turns out that I borrowed and used one for a while, after a radioisotope treatment, to track my body level of radiation.
SMBlog -- 9 January 2008

@SteveBellovin
Being a distrustful person, I suspect some corporation proposed this legislation so workers wouldn't become aware of any radiation they were exposed to on the job.