This isn’t UL approved and the contact-based design seems really sketchy at best. 3A shared is incredibly weak as well (if it’s even trustworthy). I don’t recommend this at all.
If you want something like this, go with a reputable company like Leviton or Lutron that makes high quality parts with the necessary certifications. I just checked the Leviton 2 USB receptacle on Amazon and it’s in the low $20 range so it’s not even that expensive.
Note that all devices like this have some vampire power draw and of course you can’t just unplug them.
