I currently have these for the cameras:

https://www.amazon.com/gp/product/B06XHCQBYH/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

And these just ordered these which covers monitoring:

https://www.amazon.com/Security-Alarm-System-Metal-Signs/dp/B071G3RLF9/ref=sr\_1\_5?crid=5WRWJ55168DS&keywords=Security+system+monitoring+sign&qid=1643121431&s=industrial&sprefix=security+system+monitoring+sign%2Cindustrial%2C44&sr=1-5