•Requires Ring Alarm or Ring Alarm Pro, sold separately.
•Get alerts on your phone and tablet when doors or windows are opened. Subscription required, sold separately.*
•Monitor your home from any iOS or Android device. Subscription required, sold separately.*
•Easy installation with no tools required
•Includes two 3V CR2032 batteries
•Mounts to door and window frames
•Save up to $100 per year on home insurance with a professionally monitored Ring Alarm. (Actual savings vary depending on insurance carrier and policy).
•* Ring Alarm and all Ring Alarm accessories require a subscription for in-app features and digital notifications, including digital arming / disarming and integration with other Ring, Echo, Alexa, and third party products. Subscription sold separately.

Expand your Ring Alarm system to secure each door and window in your home, and hear chirps as soon as they open. Ring Alarm Contact Sensors mount to any door or window frame in your home for easy, DIY installation. Connect them to your Ring Alarm and receive mobile alerts from the Ring App so you’ll always be the first to know when something’s ajar. Ring Protect subscription required, sold separately.*
Dimensions (Overall): 2.09 Inches (H) x 1.56 Inches (W) x .55 Inches (D)
Weight: .1 Pounds
Features: Controlled by Smartphone App
Assembly Details: No Assembly Required
Mount Type: Screw Fittings, Adhesive
Includes: Contact Sensor
Operating System Compatibility: Apple iOS, Android
Wireless Technology: Radio Frequency
Compatible With: Ring Products, Most Door Types
Minimum Operating Temperature Fahrenheit: 32
Maximum Operating Temperature Fahrenheit: 104
Motion Detection Angle: 0 Degrees
Power Source: Battery
Battery: 1 Non-Universal Lithium, Required, Included
UPC: 842861111088
Model: 4SD2SZ-0EN0