Each Ring Alarm device has a unique QR code and 5-digit code on the back.
These let you easily identify devices while working in the app. QR codes can be scanned when adding new devices to your Ring Alarm, or you can enter the 5-digit code manually.
You'll find these codes on every Contact Sensor, Keypad, Range Extender and Motion Detector. These codes can usually be found on the rear of devices, as shown in these sample images below.