Ring Alarm (2nd Gen) review: Still the best DIY home security system | TechHive
6-pack Alarm Window and Door Contact Sensor (for 2nd generation) | Ring
Ring Alarm Contact Sensor Installation | DIY | Ring Support - YouTube
Rigged Ring Alarm contact sensors with my old recessed wired door sensors - no soldering required. Took me forever to figure out where to get the wires to work so I thought