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Sterling
45575 Dulles Eastern Plz
Ste 188
Sterling, VA 20166
Opens at 10 am
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Everything for Back to School — and then someShop now

Skip to contentGo to Product Search
Sterling
45575 Dulles Eastern Plz
Ste 188
Sterling, VA 20166
Opens at 10 am
Find Another Store
Main Content
Best Buy

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home security & monitoring

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door & window security

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door & window alarms

Door Window Alarms

Enhance the security of your home with door window alarms, an essential addition to any safety-conscious household. These compact devices provide an extra layer of protection by alerting you to any unauthorized entry through doors or windows. Easy to install and user-friendly, they offer peace of mind whether you're at home or away. Perfect for apartments, homes, or offices, door window alarms are a cost-effective solution to help safeguard your loved ones and valuables. Explore our selection to find the perfect fit for your security needs and take the first step towards a safer living environment.

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

    SKU: J36CLVSCTR

    Great...Great ZWave device!...This works great! Easy to set up with my home automation hub (Homey Pro).

    Product Description

    A white, battery-powered contact sensor that alerts you via app when doors or windows are opened.
    See all Door & Window Alarms
    Your price for this item is $14.99

  2. SimpliSafe - 1pack Entry Sensor - White

    SKU: J3L6GWR5Y9

    Great Product!...I love my SimpliSafe system, and Best Buy helps me by stocking what I need. Thank you!...Love it...SimpliSafe is one of the best securities system in the market.

    Product Description

    A discreet white entry sensor that easily installs on doors or windows for reliable home security monitoring.
    See all Motion Sensors & Detectors
    Your price for this item is $15.99

  3. SimpliSafe - 4pack Entry Sensor - White

    SKU: J362VFSXGR

    Simpli safe wouldn’t honor the 4 pk pricing but Best Biy sure would. That’s why I love Best Buy...People at the monitoring center are the best in my opinion....I love my SimpliSafe system. It’s easy to...

    Product Description

    A set of four white, battery-powered entry sensors for easy installation on doors or windows.
    See all Motion Sensors & Detectors
    Your price for this item is $54.99

  4. Aqara - T1 Door and Window Sensor- Requires Hub product, Supports Apple HomeKit, Alexa, Google, SmartThings - White

    SKU: JJ8RHCJJVQ

    Love it!😍...It seems like a great idea and I love the fact that it barely uses any energy. 

    Product Description

    A white battery-powered sensor that detects door or window status and supports major smart home platforms.
    See all Door & Window Alarms
    Your price for this item is $17.99
    Save $2
    The previous price was $19.99

  5. Ring - Window & Door Sensor Instant notifications on Amazon Sidewalk, no base station needed, Pro Monitoring (sold separately) - White

    SKU: J39TLSQTZ2

    Product Description

    A battery-powered white sensor providing instant entry alerts via Amazon Sidewalk, no hub required.
    See all Door & Window Alarms
    Your price for this item is $19.99
    Save $10
    The previous price was $29.99

  6. Ring - Window-Door Sensor Instant notifications on Amazon Sidewalk, no base station needed, Pro Monitoring sold separately 2pk - White

    SKU: J39TLSSTFT

    Product Description

    A battery-powered white sensor pair delivers instant entry alerts via Amazon Sidewalk, no hub required.
    See all Door & Window Alarms
    Your price for this item is $34.99
    Save $15
    The previous price was $49.99

  7. Ring - Window-Door Sensor Instant notifications on Amazon Sidewalk, no base station needed, Pro Monitoring sold separately 6pk - White

    SKU: J39TLSQJV2

    Product Description

    A set of six white battery-powered sensors providing instant entry alerts via Amazon Sidewalk, no hub required.
    See all Door & Window Alarms
    Your price for this item is $79.99
    Save $60
    The previous price was $139.99

  8. FEIT ELECTRIC - Battery Powered Wi-Fi Smart Window Sensor - White

    SKU: J7C555P3QP

    Product Description

    A battery-powered white sensor that alerts your phone to door or window openings and tampering.
    See all Door & Window Alarms
    Your price for this item is $35.48
    Save $1
    The previous price was $36.81

  9. VEVOR - Door Chime, DC 12V, Wireless Door Open Contact Sensor Alarm Chime with 656 ft Range, Remote Control with App - White

    SKU: JJGHKKFTX4

    Product Description

    A wireless white door sensor alarm set with app control, 656 ft range, and smart assistant compatibility.
    See all Door & Window Alarms
    Your price for this item is $59.90
    Save $15
    The previous price was $74.99

  10. VEVOR - Door Chime, DC 12V, Wireless Door Open Contact Sensor Alarm Chime with 656 ft Range, 58 Chimes & 5 Adjustable Volume - White

    SKU: JJGHKKFT5S

    Product Description

    A wireless white door sensor alarm with 58 chimes, 5 volume levels, and a 656 ft range.
    See all Door & Window Alarms
    Your price for this item is $25.90
    Save $7
    The previous price was $32.99
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FAQ

Door window alarms usually consist of two parts: a sensor and a magnet. When the door or window is opened and the magnetic connection is broken, the alarm is triggered, emitting a loud sound to alert you.

Yes, most door window alarms are designed for easy DIY installation. They typically come with adhesive backing or mounting hardware and include straightforward instructions.

Many modern door window alarms offer compatibility with popular smart home systems, allowing you to receive alerts on your smartphone or integrate them with other smart devices.

Most door window alarms are battery-powered, making them easy to install without wiring. Some models include low-battery indicators to let you know when it's time for a replacement.

Yes, many door window alarms are versatile and can be installed on sliding doors and windows, as long as the sensor and magnet can be aligned properly.