Are those the input resistors that are a millimeter or less away from that metal button and it's contacts (on the LV side)?
No way this actually passed any certs if that's the case.
The switch is probably actuated via a plastic button (don't know with this, but that's what happens on some mains plugs with smarts). That would keep the user away from danger, so wouldn't that pass certification?
Small plasitic button between you and potentially 480V three phase mains (or whatever dinguses stick it into). Also, if it arcs over and shorts out internally, the arc flash would cause it to explode just like cheap dollar Chinese meters though worse due to it's pencil probe shape (much higher chance of hand loss).
![Broken! :-BROKE](https://www.eevblog.com/forum/Smileys/default/smiliey_scope_broke.gif)
It could also be a button to ground so connected to the USB port.
Plus, did you see their horrid excuse for a fuse holder earlier? Oh hell no...as bean said, shock hazard.
![Scared :scared:](https://www.eevblog.com/forum/Smileys/default/scared.gif)
EDIT: And smart sockets should have the HV and LV properly isolated.