If you have existing 345Mhz sensors you could reuse them with the 345Mhz version of any of the panels we sell here.
The standard panel versions are 319.5Mhz, be sure to click the link under the panel you want to select the 345Mhz option.
If you have interconnected AC powered smoke detectors you can monitor all of them with one Firefighter audio detector:
One other questions while Im at it. I have Ring cameras on all four sides of the house and a Ring doorbell cam. Does it make sense to integrate these? If so, could I even integrate Ring products? Thanks again.
Ring cameras are not compatible with Alarm.com. A list of cameras which can be used with our service are in the link below.