Hi @levickij, it’s a 3d printed wall mount that I bought from here. To mount it, you just need a pair of screws and dowels. Regarding the power supply, the tablet needs 5 Volts and the wall mount already comes with a small micro usb plug that allows to hide the connector so, if you want all wires hidden, you will need to get 5V behind the tablet wall mount. In my case, I had an old thermostat in there with a 5V pair of wires, though I could not use it directly because although it had the correct voltage, it didn’t have enough power (not enough current to charge the tablet), so I had to install the original amazon power supply right where the old thermostat power supply was. If you have close to where you want to install the panel, an outlet with other voltage, you could use the proper electric transformer to be able to supply in there 5V.
Here, there’s a link from the same site giving some advises regarding which charging option is most appropriate for each situation.