Seriously, who needs to record someone without the knowledge of the person being recorded? That’s a big red flag, a perverted character, there’s no other explanation. Creepy Mark Zuckerberg allowed other creepy characters to share personal moments with him.
Doing an Internet search, they are about the same price.
Or you could just use a cheap camera (might be less expensive than the hard hat) or your work phone. (Free) They also have the benefit of not being fixed to your head and a viewfinder so you know exactly what’s in frame.
You’re now starting to argue on which one can better serve a stated purpose when I’m trying to state that the existing product is being used for a specific role. A hands free camera that takes video wherever you look can be a tool which some inspectors may want while others may use something else like a phone.
It is close enough where the tradeoffs are evaluated on an individual level instead of categorically being thrown out.