Ring Alarm Contact Sensor 2-Pack – 2nd Gen | Instant Window & Door Alerts | Approximately 3-Year Battery Life | Slim Design | Easy Installation | Base Station Required

Price: $39.99
(as of Aug 20, 2025 13:26:34 UTC – Details)



Get instant mobile alerts when doors and windows open in your home with a Ring Protect subscription (sold separately).
Now smaller to enable increased placement options.
Easy installation with no tools required.
Mounts to door and window frames.
Includes two 3V CR2032 batteries.
Requires the Ring Alarm Base Station.