Exploring the Efficiency and Safety of Wall-Mounted USB Chargers and Concealed USB Extensions

Hello,
I have a problem. I will be renovating and I would like to throw all cables in flush-mounted boxes. As with the cable from the net, the speakers do not have a problem so I do not know how with USB.

I wanted to have a USB charger in the wall, I saw about 160 PLN for such concealed but I do not know how good and trustworthy it is? I know that usually chargers can not be connected all the time to electricity because after a while they burn. How is it with these concealed? Can you use it safely without the risk of damage to the equipment? Do you recommend any specific companies?

I would like to make a USB concealed socket only for the computer. Something that I plug the pendriva into the wall and it is still connected to the PC. It would be very convenient. I know that USB can have max. 5m. This extension in the wall would be very short. Less than a meter so that would not be a problem. But nowhere could I find such a concealed extension cords: / did anyone see something similar?

@ wrobel102 If you want to have something specific and good I recommend GIRA equipment.

I would try to build a usb hub in the wall (in some "contact") as if it were active it's pretty cool. There are active USB extension cords.
Just remember that a cable to the computer will be coming from somewhere on the wall. Another option is a router with usb which will make usb available as a network drive, but then it is only on pendrajwa.
Another option is a keyboard with a USB hub. I have a keyboard attached to an extension cable and a mouse, so if I connect another compa I put it on my desk and just attach the keyboard and I have a mouse and a keyboard right away. But sometimes I use it more conveniently than two keyboards on the desk, or take both versions out of the closet and practically do not tell them; P
In addition, you can do this inlet between two computers.
I use a USB extension cable with a larger housing that I glued to the desk
Something in this pattern but a different company but it's rather whatewer.
http://www.redcoon.pl/B522092-LogiLink-Przed%C5%82u%C5%BCacz-USB-20-CU0013B_USB