What is Reddit's opinion of j4home DC-DC Ring Alarm Keypad Converter Step Down Module 12V to 5V Micro USB?

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Well well that maybe right 99% of the power wire is made for in wall use. Just the last 1% is the 12V to 5v USB transformer from Amazon. Luckily it all accessible right right behind the keypad.

https://www.amazon.com/dp/B07RDGR9GF?psc=1&ref=ppx_yo2_dt_b_product_details

You’d have to research. Battery life is amazing though and I have all that info ported into Home Assistant with low battery notifications, etc

Since I had old wired keypads on my wall, I was able to replace them with the ring ones and hard wire them in using this converter:

j4home DC-DC Converter Step Down... https://www.amazon.com/dp/B07RDGR9GF

If you had an existing alarm and wiring. I bought this to convert 12v dc to 5v.

https://www.amazon.com/j4home-Converter-Module-Adapter-Compatible/dp/B07RDGR9GF

Also could use a blank electrical outlet cover on the wall and mount the keypad to that?

Need to power an old school 4 wire motion detector that was connected to the napco panel for power(and hard wired to a ring retrofit panel for circuit monitoring) as well as these adapters https://www.amazon.com/dp/B07RDGR9GF/ref=cm_sw_r_cp_apa_glt_fabc_KN5KM1076Q09TBSYYZXY That give constant power to my ring alarm keypads.
Not super concerned with battery backup as I can plug everything into my UPS. Also don't want to spend that much. Do you think those transformers you linked can handle more than one device at a time or does each keypad and motion need their own transformers.

https://www.amazon.com/j4home-Converter-Module-Adapter-Compatible/dp/B07RDGR9GF

These are what I used.

I also had to unhook some wires from the old box that was from the early 2000’s. I they were not hot but I capped them anyway with electrical twist nuts

https://www.amazon.com/dp/B07RDGR9GF/ref=cm_sw_r_cp_apa_fabt1_p7YQFbK3XVVRY

Or make the hole bigger use one of these

j4home DC-DC Converter Step Down Module 12V to 5V Micro USB Power Adapter (Ring Alarm keypad Compatible) https://www.amazon.com/dp/B07RDGR9GF/ref=cm_sw_r_cp_api_i_MseNFbDCE3Q69?_encoding=UTF8&psc=1

Is this the right one? https://www.amazon.com/convertidor-adaptador-alimentaci%C3%B3n-compatible-teclado/dp/B07RDGR9GF/ref=sr_1_1?dchild=1&keywords=j4home+DC-DC+Converter+Step+Down+Module+12V+to+5V+Micro+USB+Power+Adapter+%28Ring+Alarm+keypad+Compatible%29&qid=1597614577&s=electronics&sr=1-1