Hi @Mrace1017. Yes you can use their Ring Alarm components, aside from the Base Station, with your own Ring Alarm system. You'll want to make sure the previous owner removes the devices from their Ring Alarm system and then removes the Base Station from their Ring account. If you aren't able to add the different components to your system, you may need to [factory reset](https://support.ring.com/hc/en-us/articles/360000071906-How-to-Factory-Reset-Your-Ring-Alarm-Devices) them first. After they've been factory reset, you should be able to set them up with your system in the Ring App. I hope this helps! :)