"Spectrometer" could mean anything. What are they actually selling? You have to drill down on their web page to find that it's near-infrared reflected light. Yawn. Ocean Optics has been selling that (and much more) in tiny devices for decades. You can buy them on eBay. There's just not much information in NIR. It'll tell you "organic" or "inorganic" and not much more. You can tell that
just by looking.
Now, when it can do Raman spectroscopy, call me. Not that far off. There are already hand-held Raman gadgets that I wish I could justify buying. Spin-offs from cancelled Russian Mars probes in the 90's. They cut the scientists loose and those guys went out and marketed their stuff. Also a pretty neat compact ground-penetrating radar unit came out of that. Cool Toys for Boys.