Last Chance 48-Hour Flash SaleEnds Dec. 24. Limited quantities.Shop now

Skip to content
Gift Ideas
Main Content

Customer Ratings & Reviews

No content
  • Front. Ring - Alarm Contact Sensor (1st Gen) - White.
  • Alt View 11. Ring - Alarm Contact Sensor (1st Gen) - White.
  • Ring Alarm - Testimonial video 0 minutes 45 seconds
  • Ring Alarm Product Overview video 0 minutes 30 seconds
  • Learn How Ring Security Can Help Protect Your Home video 1 minutes 17 seconds

Ring - Alarm Contact Sensor (1st Gen) - White

Model:
4SD1S7-0EN0
SKU:
6129211
Highly rated by customers for:
Your price for this item is $19.99

Customer reviews

Rating 4.8 out of 5 stars with 1076 reviews

Rating Filter

Rating by feature

  • Value

    Rating 4.6 out of 5 stars

  • Quality

    Rating 4.8 out of 5 stars

  • Ease of Use

    Rating 4.8 out of 5 stars

Pros mentioned filter

Cons mentioned filter

98%would recommend to a friend

Customers are saying

Customers express satisfaction with the Alarm Contact Sensor (1st Gen)'s ease of use, installation process, and affordable price point. The sensor's compatibility with the Ring system and its contribution to enhanced security are also well-received. However, some customers have expressed a desire for a smaller size.

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 43 Showing 841-860 of 1,076 reviews

  • Awesome deal

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

    Thank you Best Buy. My first online order . I’ve always shopped in store ! Thanks again

    This review is from Ring - Contact Sensor (1st Gen) (6-Pack)

    I would recommend this to a friend

  • Great cheap alarm

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

    These work in any configuration. No need to drill and screw as the adhesive is second to non

    I would recommend this to a friend

  • I installed 10 of these...

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

    The interesting part of installing 10 of these units is having 1 that didn't work. I returned it and got a new one. I guess that's electronics, however; I would think they would test them better.

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

    I would recommend this to a friend

  • Ring products the best

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

    I love my ring alarm system. Very complete and you can be buying more of these sensors separately.

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

    I would recommend this to a friend

  • Excellent

    |
    |
    Posted . Owned for 1.5 years when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Great product , nice and durable, really good tecnology and beatiful ergonomics.

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

    I would recommend this to a friend

  • Spilt with a friend

    |
    |
    Posted . Owned for 9 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    I only needed one extra so I brought this to split with a friend.

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

    I would recommend this to a friend

  • Cant say much yet

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

    It cost a bit to set up a ring security system but after the initial cost of installing one, it is the way to go for the annual cost to protect your home. That is where you will save money.

    This review is from Ring - Contact Sensor (1st Gen) (6-Pack)

    I would recommend this to a friend

  • Works as intended

    |
    |
    Posted . Owned for 8 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Works as intended. No issues at all. Love the Ring alarm system!!

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

    I would recommend this to a friend

  • Great

    |
    |
    Posted . Owned for 8 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Very good, high quality and easy to use. Light and well designed.

    This review is from Ring - Contact Sensor (1st Gen) (6-Pack)

    I would recommend this to a friend

  • Great

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

    Excellent product, works really good we are really happy . Recommend and we planing buy cameras too

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

    I would recommend this to a friend

  • Excellent

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

    Bought the ring alarm and needed a couple more sensors for my doors. Easy setup and install

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

    I would recommend this to a friend

  • easy to install and link with rest of system

    |
    |
    Posted . Owned for 9 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Well priced, good product, readily available, great experience.

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

    I would recommend this to a friend

  • Must Have for split foyer homes

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

    No bundled included the amount of sensor needed for my home but these were reasonable.

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

    I would recommend this to a friend

  • Exactly what I needed

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

    I had purchased the starter set during prime day but I needed just two more sensors..

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

    I would recommend this to a friend

  • It’s a sensor, and it works

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

    It’s a magnetic sensor. It works. It comes with everything you need. Not much more to say.

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

    I would recommend this to a friend

  • Love my Ring system,

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

    Love it!! No problems with my Ring security system. Will recommend to others.

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

    I would recommend this to a friend

  • Nice add on to Ring Security System

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

    Not many included in the basic kit. These add-ons help make the system usable.

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

    I would recommend this to a friend

  • Awesome Contacts

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

    This contacts ate awesome Ring has such an amazing product a bit expensive but worth it

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

    I would recommend this to a friend

  • very easy to install but one malfunctioned

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

    Glad Best Buy had it in stock. Very easy to install with the other ring home security devices, but there was one of the six that didn't work and another that the battery was weak.

    This review is from Ring - Contact Sensor (1st Gen) (6-Pack)

    I would recommend this to a friend

  • Great headphones

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

    Headphones fit well and do the trick when I am flying to cut out the plane noise

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

    I would recommend this to a friend
Page 43, Showing 841-860 of 1,076 reviews
Sign in or Create Account

Get the latest deals and more.

Best Buy appLearn more
Share on YouTubeShare on InstagramShare on TikTokShare on FacebookShare on PinterestShare on X
Best Buy Canada
AccessibilityTerms & ConditionsPrivacyInterest-Based AdsState Privacy RightsHealth Data PrivacyDo Not Sell/Share My Personal InformationLimit Use of My Sensitive Personal InformationTargeted Advertising Opt OutCA Supply Chain Transparency Act
In-store pricing may vary. Prices and offers are subject to change. © 2025 Best Buy. All rights reserved. BEST BUY, the BEST BUY logo, the tag design, and MY BEST BUY are trademarks of Best Buy and its affiliated companies.