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  • Front. Ring - Alarm Contact Sensor (2nd Gen) (2-Pack) - White.
  • Ring Home: See more. Know more. Protect more. Subscribe to Ring Home to supercharge your Ring experience with our most advanced video, intelligence, and security features. Choose a plan that's right for you. Recommended: * Basic: Get the basics with video event playback and smart notifications for one home camera. * Standard: The ideal Ring experience with enhanced features and helpful automations for all your home devices in one location. * Premium: Get the most advanced features for your home devices in one location. Additional options: * 180 Days Video Event History: $4.99/month * Person and Package Alerts: $49.99/month * Video Preview Alerts: $9.99/month * 0% Financing on select Ring.com purchases: $99.99/month * Alarm Professional Monitoring: $19.99/month (add-on to Standard or Premium plans) * Smart Video Search Beta: $19.99/month (add-on to Premium plan) * 24/7 Recording: $19.99/month (add-on to Standard or Premium plans) * SOS Emergency Response: $19.99/month (add-on to Premium plan)
  • Alt View 11. Ring - Alarm Contact Sensor (2nd Gen) (2-Pack) - White.
  • Alt View 12. Ring - Alarm Contact Sensor (2nd Gen) (2-Pack) - White.
  • Alt View 13. Ring - Alarm Contact Sensor (2nd Gen) (2-Pack) - White.
  • Alt View 14. Ring - Alarm Contact Sensor (2nd Gen) (2-Pack) - White.
  • Ring Home: See more. Know more. Protect more. Subscribe to Ring Home to supercharge your Ring experience with our most advanced video, intelligence, and security features. Choose a plan that's right for you. Recommended: * Basic: Get the basics with video event playback and smart notifications for one home camera. * Standard: The ideal Ring experience with enhanced features and helpful automations for your home devices in one location. * Premium: Get the most advanced features for your home devices in one location. Additional options: * Alarm Professional Monitoring for +$10: Includes everything Standard, plus 24/7 recording, SOS Emergency Response, and more. * Alarm Professional Monitoring for +$10: Includes everything Premium, plus Alarm Professional Monitoring for +$10.
  • Ring Alarm Products video 2 minutes 16 seconds
  • Ring Smart Lighting video 1 minutes 00 seconds

Ring - Alarm Contact Sensor (2nd Gen) (2-Pack) - White

Model:
4SD2SZ-0EN0
SKU:
6403968
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Customer reviews

Rating 4.8 out of 5 stars with 1320 reviews

Rating Filter

Rating by feature

  • Value

    Rating 4.7 out of 5 stars

  • Quality

    Rating 4.8 out of 5 stars

  • Ease of Use

    Rating 4.8 out of 5 stars

97%
would recommend
to a friend

Customers are saying

Customers regard the Alarm Contact Sensor (2nd Gen) (2-Pack) highly for its ease of use and straightforward installation. The sensor's compact size and reasonable price are also well-received, along with its compatibility with the Ring system. However, some customers have reported issues with connection stability and range limitations.

This summary was generated by AI based on customer reviews.

The vast majority of our reviews come from verified purchases. Reviews from customers may include My Best Buy members, employees, and Tech Insider Network members (as tagged). Select reviewers may receive discounted products, promotional considerations or entries into drawings for honest, helpful reviews.
Page 29 Showing 561-580 of 1,320 reviews

  • Easy Sensors

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    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Additional sensors work great with the Ring system that i currently have. Easy to use and sync with your current system

    This review is from Ring - Alarm Contact Sensor (2nd Gen) (6-Pack) - White

    I would recommend this to a friend

  • Ring alarm sensors

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    Posted . Owned for less than 1 week when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    So far so good with these little dudes. However, not totally sold on it and contemplating going back to My old service.

    This review is from Ring - Alarm Contact Sensor (2nd Gen) (6-Pack) - White

    I would recommend this to a friend

  • Sensor for Ring security system

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    Posted . Owned for 1 month when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    This is a great product: easy to install & add to our existing Ring security system.

    I would recommend this to a friend

  • Ring Alarm Sensor

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    Posted . Owned for 5 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Works only with Ring Alarm system. Easy to install and connects right away

    I would recommend this to a friend

  • Happy customer

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    Posted . Owned for 3 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Highly recommended to anyone interested in this item

    This review is from Ring - Alarm Contact Sensor (2nd Gen) (1-Pack) - White

    I would recommend this to a friend

  • Entry Sensors work great

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    Posted . Owned for 1 month when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Sensors are great and batteries have no visible loss after 1 month. Little larger than the Wink Window sensors they replaced.

    This review is from Ring - Alarm Contact Sensor (2nd Gen) (6-Pack) - White

    I would recommend this to a friend

  • Motion detector

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    Posted . Owned for 1 week when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Bought this motion detector to add to our existing alarm system. Super easy to install and setup on the existing system.

    This review is from Ring - Alarm Motion Detector (2nd Gen) (1-Pack) - White

    I would recommend this to a friend

  • Ring

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    Posted . Owned for 1 month when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Ring is the best do it yourself alarm system, anyone can install this with Ring's install videos.

    This review is from Ring - Alarm Contact Sensor (2nd Gen) (6-Pack) - White

    I would recommend this to a friend

  • Perfect addition to Ring

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    Posted . Owned for 2 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Needed additional sensors to add to current system. These are simple to install and link to your Ring security system.

    This review is from Ring - Alarm Contact Sensor (2nd Gen) (6-Pack) - White

    I would recommend this to a friend

  • Good

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    Posted . Owned for 6 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Good sensor for the ring alarm. I have all the equipment and it works great

    This review is from Ring - Alarm Contact Sensor (2nd Gen) (1-Pack) - White

    I would recommend this to a friend

  • Would recommend

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    Posted . Owned for 1 month when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Easy to install. Peel, stick, and arm. Integrates seamlessly with a previously installed system.

    I would recommend this to a friend

  • Would recommend and easy to use

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    Posted . Owned for 3 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    These are so easy to install and control. I love how you can set up the chime to be different.

    This review is from Ring - Alarm Contact Sensor (2nd Gen) (6-Pack) - White

    I would recommend this to a friend

  • Ring Sensors

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    Posted . Owned for 1 month when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Easy to install by following the instructions great value.

    This review is from Ring - Alarm Contact Sensor (2nd Gen) (1-Pack) - White

    I would recommend this to a friend

  • Nice

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    Posted . Owned for 1 month when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    These are easy to install and are great when you get notifications

    I would recommend this to a friend

  • Love my ring!

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    Posted . Owned for 2 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Love these! I have my whole house sensored because I have young kids! Love that I can buy more seperately

    I would recommend this to a friend

  • Security system

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    Posted . Owned for less than 1 week when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Brought these for my mom's house. She already has the security system. Just decided to add on. Make her more secure.

    I would recommend this to a friend

  • Ring Contact sensors

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    Posted . Owned for 2 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    We added a Ring alarm and added these contact sensors to cover additional entries. It works well and was easy to set up.

    This review is from Ring - Alarm Contact Sensor (2nd Gen) (6-Pack) - White

    I would recommend this to a friend

  • Very good

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    Posted . Owned for 1 week when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Very good for the safety and the price given will recommend for everyone

    This review is from Ring - Alarm Motion Detector (2nd Gen) (1-Pack) - White

    I would recommend this to a friend

  • Easy to install

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    Posted . Owned for 1 week when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Works great and easy to install. When i need to buy more i will definitely be back to get them.

    I would recommend this to a friend

  • Awesome and amazing

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    Posted . Owned for 1 week when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Awesome and amazing easy contact sensor from ring.

    I would recommend this to a friend
Page 29, Showing 561-580 of 1,320 reviews
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