There's an entire industry of selling snake-oil Batman shit like this to law enforcement/mall cops. It's a delightful fusion of ill will, they operate with minimal oversight and get to take advantage of government (procurement), law enforcement (mostly ignorant of tech), and the good 'ol citizenry (cast as cattle as usual).

I love how, when one of these places recruits you, it takes forever to learn what they're about, because their website is nothing but euphemisms.