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Ring - Alarm Contact Sensor (2nd Gen) (1-Pack) - White

Model: 4SD1SZ-0EN0
SKU: 10811739
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Customers are saying

Customers praise the product for its exceptional ease of use, overall performance, and straightforward installation. They also appreciate its security features, compact size, compatibility, good price, long battery life, and thoughtful design. However, some users have reported minor issues with connectivity and limited range. A few customers also noted concerns regarding sensitivity and occasional unexplained motion detection.

Generated by AI based on customer reviews.

Number of Devices Included

1
Features

  • Requires Ring Alarm or Ring Alarm Pro, sold separately.

  • Get alerts on your phone and tablet when doors or windows are opened.

  • Monitor your home from any iOS or Android device.

  • Easy installation with no tools required

  • Includes two 3V CR2032 batteries

  • Mounts to door and window frames

  • Get 24/7 emergency police, fire, and medical response when sensors are triggered when you subscribe to Ring Home Standard or Premium, sold separately, and add Alarm Professional Monitoring* to your Plan.

See all features
Specifications
  • Detector Type
    Contact, Contact, Contact, Contact, Contact
    Sensor Type
    Magnetic
    Wireless Connectivity
    Z-Wave, Z-Wave, Z-Wave, Z-Wave, Z-Wave
    Maximum Wireless Range
    250 feet
    Works With
    Amazon Alexa, Ring
    Power Source
    Battery-powered
See all specifications
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Reviews

Rating 4.8 out of 5 stars with 1324 reviews

5 star rating. 1,133 reviews4 star rating. 134 reviews3 star rating. 29 reviews2 star rating. 11 reviews1 star rating. 17 reviews
97% would recommend to a friend
Customers are sayingCustomers praise the product for its exceptional ease of use, overall performance, and straightforward installation. They also appreciate its security features, compact size, compatibility, good price, long battery life, and thoughtful design. However, some users have reported minor issues with connectivity and limited range. A few customers also noted concerns regarding sensitivity and occasional unexplained motion detection.
This summary was generated by AI based on customer reviews.
  • Ease of use (562)
  • Overall Performance (153)
  • Installation (137)
  • Security (61)
  • Size (60)
  • Connectivity (10)
  • Range (9)
  • Sensitivity (6)
  • Motion Detection (3)

Customer Images

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.

  • Rated 5 out of 5 stars

    Extra sensors to protect all of the windows

    Had to buy more ( 6 ) sensors to protect the windows. The ( 4 ) sensors that came with the Ring Alarm system were used to protect the doors. Easy to install , compact and they will work when offset from each other or turned sideways. Had to be creative for two of the doors..... kitchen door to garage and the sliding glass door. ( see enclosed pics ) So far everything has been working great and no false alarms.

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

    Posted by Roberto

  • Rated 5 out of 5 stars

    Works great!

    We started with the security system and added these door sensors to our system at home. They were simple to install and add to our Ring App security system. We have every door protected and they have worked great since day 1. If you are looking for a great way to protect your home and install it yourself I highly recommend these comtact sensors.

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

    Posted by Dadlife

  • Rated 5 out of 5 stars

    HOME SECURITY

    THESE CONTACT SENSORS LET ME SLEEP GOOD AT NIGHT- THEY ARE LIKE HAVING A SECURITY GUARD WHEREVER U PLACE THEM - EASY TO INSTALL & QUALITY MANUFACTURING WHAT ARE U WAITING FOR.

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

    Posted by TONY

  • Rated 5 out of 5 stars

    Guards a room

    Great motion detector for a room,if someone breaks a window to get in,the motion detector will pick up the movement! Kinda pricey but does the job….

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

    Posted by AceG

  • Rated 5 out of 5 stars

    Great door sensor for my back door

    Works great! I have several door sensors. They all work great!

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

    Posted by JosephT

See all customer reviews

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Pros for Ring - Alarm Contact Sensor (2nd Gen) (1-Pack) - White
Ease of use, Overall Performance, Installation, Security, SizeThere were no pros for this product—There were no pros for this product—There were no pros for this product—
Cons for Ring - Alarm Contact Sensor (2nd Gen) (1-Pack) - White
Connectivity, Range, Sensitivity, Motion DetectionThere were no cons for this product—There were no cons for this product—There were no cons for this product—

Specs

Questions & Answers

  • Is the battery replaceable in this detector?

    Yes, the battery is replaceable in this detector.

    This question and answer was generated by AI based on customer and product data.

  • Does this device require other products to operate?

    Yes, this device requires Ring Alarm or Ring Alarm Pro to operate.

    This question and answer was generated by AI based on customer and product data.

  • What kind of battery does the motion detector use?

    The motion detector uses AA batteries.

    This question and answer was generated by AI based on customer and product data.

  • How many motion detectors are included in the package?

    There are two motion detectors included in the package.

    This question and answer was generated by AI based on customer and product data.

  • Can this motion detector work with Alexa?

    Yes, this motion detector works with Amazon Alexa.

    This question and answer was generated by AI based on customer and product data.
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