EDIT: Editing previous 'alert' post, about this product:
..Which was both *dangerous*, as-initially advertised, and, Illegal, if-used, in-public, in the US... However, there has been a very-respectable 'about-face', from the manufacturer / distributor, 'Goldenstar', and they deserve much praise for the decision to abandon sales / promotion of this product..
..NONETHELESS, I will leave-up the 'summary' of why these were such a bad idea, a) In-case they 're-surface' via another ChOEM / distro-haus, and b) so those, otherwise UNaware, can be aware of the 'whys' / what-made this product border-on 'dangerous'..
#1, These power-levels are *waaay* over the safe-limits for 'MPE' (Maximum Permissible Exposure) for laser-light to enter an eye, even taking the 'blink-reflex time' into account.. *Especially* that much 532, in that fine a beam.. Those power-levels / design of the 'unidirectional-beaming capability' (head + body-movement) plus the lack of *any* safety-controls actually (imo) makes this product DANGEROUS. Additionally,..Think about 'where the 'intended audience / viewers' be looking, when the hat-wearer is beaming-forth? *Straight into low-divergence >30-50mW laser-beams*.. BAD IDEA. Even-if the lasers were 'limited to only 5mW', these would still be a bad-idea, because inherently, they're near / at eye-level..
Reference for the bioeffects of lasers at this power is in Page 6 of this PDF..
#2, These power-levels are also, *way* over the Legal public-use-limit for 'pointing devices' (5mW..) Use of these - legally - in public, would, yes - actually require a *Variance* as they absolutely fall under the category of a 'Demonstration' product.. Wholly-subject to the Regulations for-such.. Wearing / using these in public also breaks the '3 Meter Rule', since these are way-over 5mW, well-into the other Class that requires such separation....
#3, This product is 'BAD EDUCATION'... a) it sends the message that 'lasers are just harmless toys' - and at these power-levels, they're certainly not!.. But, even if they were 'only 5mW', it still is a horrible-idea to have lasers beaming at face-height.. b) It 'spreads ignorance' of laser-safety principles.. How many countless / ignorant-of-the-dangers kids might accidentally blind / damage who-knows how-many poor cats / dogs, eyes? How many *kids* are gonna 'turn these on, in their own face / eyes'??
#4.. This product - yes, in-fact - could 'damage' the very-industry ChOEMs are hoping-to / have gained sales-ground in, here in the US: 'legitimate' Laser products, like Projectors, etc.. When 'less-than 100% correctly-informed lawmakers' see ill-concieved products like this? They go ballistic, and start making recommends for 'blanket legislations' / bans and such, which only hurts *all* of us, from component-sales, to full-on Pro Show Co's.
..To summarize 'why-not make / sell stuff like this'? Well, in the immortal-words of Ian Malcolm: '..You're so busy thinking about if you could, that you didn't stop to think if you SHOULD!..' Perfect 'food for thought' for this, and many-other products out there.. (ie: Wanton Lazors
That is all..
j