Hardwire Ring Keypads using Existing Legacy Alarm Wired Keypad Wires

With no outlets appropriately placed to snake USB power up through wall for the additional convenience of full time powered keypads, I looked for a solution to push 5VDC at 2A minimum over existing keypad wiring. The following two devices did the trick. For power (up to 4 keypads safely per Ring power specs - larger version for more devices available) https://www.amazon.com/dp/B08CRQ45BD?th=1 For conversion from 12VDC down to 5VDC with plug absolutely compatible with keypad micro USB these Buck Converters: https://www.amazon.com/dp/B08Q34TYV5?th=1 Yes, you can buy a 120VAC direct to 5VDC converter but they are not "plug and play" and easy to mount like the one I am using above. Most also have fans - another component to break, which is why I picked the one above. Then you also need to buy micro USB pigtails but they do not have a long enough tail to permit easy threading out of your wall into back of keypad. The setup above was the least headaches. 20 minutes for three keypads. Easy peasy. You wire nut all the reds to the positive (brown for some reason) wire on the power supply, and all the blacks to the negative (blue for some reason) on the power supply. Make sure you are able to correctly identify your legacy keypad wires - usually red/black/green/yellow and marked - if you had a good installer - or can identify the keypad lugs on your old alarm panel. Make sure you have 120VAC close enough or that you have extra low voltage wire to get power from the power supply to the keypad wires. CAUTION: Do not look at your old alarm 120VAC to 12VAC power supply - the 12V out is AC not DC. Your old alarm panel power supply WILL NOT WORK for this unless it is 120VAC to 12VDC - not 12VAC. Most alarm panels are 12VAC (because alarm installers could not tell red from black?) and will not work. Recommend electrical tape on all in-wall connections before pushing converter back in so you don't accidentally lose in the wall! If you do not have a large enough hole you will need to cut the drywall for a hole slightly larger than the end of a pack of gum to be able to thread the buck converter behind the center slot of the keypad mounting bracket where the USB pigtail needs to connect. Three of my keypads powered and running like champs. Ring will undoubtedly warn in comments that failure to use Ring-approved power supplies blah blah blah blah blah. 5VDC is 5VDC, micro USB is micro USB. Components above are highly-rated on Amazon. Google search shows others have used these buck converters satisfactorily on Ring keypads. But - failure to use Ring-approved power blah blah blah blah blah blah blah. Yes, with the components above, you have 5 VDC via micro USB, providing at least 2A available, stable, and continuous to the keypad. Thems the specs. The keypad neither knows nor cares what color the USB cable is or what make the power supply at the end of the USB cable is. blah blah blah, blah blah, blah blah blah