2-Pack Alarm Window and Door Contact Sensor Certified Refurbished
How customer reviews and ratings work
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, Amazon doesn't use a simple average. Instead, Amazon's system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on Amazon
$33.99 $39.99
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Devices that work and look like new.
Each Certified Refurbished device passes rigorous testing and thorough cleaning. Backed by the same one-year limited warranty as a new device.
Functionality
Every device goes through a full diagnostic test, thorough cleaning and inspection, secure data wipe, and replacement of any defective parts identified in testing (where applicable).
Battery
Each device battery is tested and charged (if applicable).
Software
This device software is compatible with the latest firmware updates.
Make sure the doors and windows are shut.
Ring Alarm Contact Sensors easily mount to any door or window frame in your home for easy, DIY installation. With real-time alerts from the Ring App when your Sensors separate, you’ll always be the first to know when something’s ajar.
Plus, if you’ve enrolled in our optional Alarm Professional Monitoring1, you can choose to receive a call from the monitoring center when the Contact Sensor is triggered and request emergency assistance if needed.
- Requires Ring Alarm or Ring Alarm Pro Security Kit.
- Triggers your Alarm when someone tampers with Contact Sensors.
Tech Specs - Contact Sensor
Supported Devices
Requires Ring Alarm or Alarm Pro (sold separately)
Size
2.09 in X 1.12 in X 0.55 in
Power and Connectivity
2 CR2032 Coin cell batteries
BATTERY WARNING: KEEP OUT OF REACH OF CHILDREN. Store spare batteries securely. Dispose of used batteries immediately and safely. If you think batteries might have been swallowed or placed inside any part of the body, seek immediate medical attention.
Uses two CR2032 batteries, included, which may last up to 3 years depending on usage. Cold temperatures may drain battery life faster.
32°F to 120°F (0°C to 49°C)
Z-Wave (250-foot range to Base Station open air, line of sight)
Installation
Indoor use
Mounts to doors and windows
1 inch. Leave 1/2" space on non-magnet side to access battery compartment.
General
Frequently Asked Questions
Where does 2-Pack Alarm Window and Door Contact Sensor ship to?
2-Pack Alarm Window and Door Contact Sensor ships via ground within the U.S. (excluding Alaska, Hawaii, American Samoa, Guam, Northern Mariana Islands, Puerto Rico, and the U.S. Virgin Islands.)
Amazon Customer Reviews
How customer reviews and ratings work
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, Amazon doesn't use a simple average. Instead, Amazon's system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on Amazon
1Professional Monitoring is an add-on plan that first requires a compatible Ring Home subscription. Both sold separately. Service available within the U.S. (all 50 states, but not U.S. territories) and in Canada (excluding Quebec). Ring does not own its monitoring center. Smoke and carbon monoxide monitoring is not available for business or commercially zoned addresses. See Ring Alarm licenses at: ring.com/licenses. Additional fees may be required for permits, false alarms, or Alarm Verified Guard Response, depending on your local jurisdiction.
