This is a enclosure to mount for this little USB-Module. I created this to use in our recreation vehicle. I have seen that in EBAY, follow this Link:

https://www.ebay.de/itm/Auto-KFZ-4-X-USB-Step-down-Stromversorgung-Modul-DC-12V-24V-40V-to-5V-5A-Neu-New/272852775315?hash=item3f874af193:g:vwkAAOSw~05ZwCCY

The output power is 5A. You can charge many devices at the same time.