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Electronic Alarm System

An alarm system is a security device for your home or business that alerts you to the presence of intruders, or sounds an alarm if the door is opened. Alarm systems are often used in conjunction with other home security devices, such as cameras and motion sensors. Browse the top-ranked list of electronic alarm systems below along with associated reviews and opinions.

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  1. Ring - Alarm Security Kit 5-Piece (2nd Gen) - White

    SKU: J36CLVS273

    Product Description

    A white, app-compatible security kit with motion detection, battery backup, and easy setup for small homes.
    See all Home Security Systems
    Your price for this item is $199.99

  2. Ring - Alarm 8-Piece Security Kit - White

    SKU: J36CLVS279

    Product Description

    A white, app-compatible security kit with motion detection, battery backup, and real-time alerts for home protection.
    See all Home Security Systems
    Your price for this item is $249.99

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

    SKU: J36CLVSCTR

    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

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

    SKU: J36CLVSCW6

    Product Description

    A pair of easy-to-install white sensors that alert you via app when doors or windows open.
    See all Door & Window Alarms
    Your price for this item is $44.99

  5. Security Upgrade for Viper DS4+ Remote Start Systems - Black

    SKU: J7Q8KPXQ8P

    I purchased the Security Upgrade for Viper DS4+ Remote Start Systems for my Car Alarm System....I have always been a fan of Viper alarms. I was happy to find out that Viper redid the way they packaged...

    Product Description

    A black security kit with a six-tone siren and shock sensor for enhanced vehicle theft protection.
    See all Remote Start & Security Systems
    Your price for this item is $64.99
    Save $35
    The previous price was $99.99

  6. SimpliSafe - Wireless Auxiliary Siren - White

    SKU: J3L6GWR598

    The external alarm is a great accessories for the simpli safe System by adding a more audible alarm to the system....Love this alarm system for my small home. Great price. Needed an added alarm for upstairs....

    Product Description

    A weatherized white wireless siren emitting a loud 105dB alarm for enhanced indoor or outdoor security.
    See all Security Camera & System Accessories
    Your price for this item is $59.99

  7. Yale - Smart Lock with Matter, Designed for Google Home; Electronic Deadbolt with Pushbutton Keypad - Matte Black

    SKU: J7684KX9K4

    This is the best lock system that I have ever used before. It is so easy to use and I love that I can contril it on my phone as well. ...I like that it works with different smart home systems like Google...

    Product Description

    A matte black electronic deadbolt with pushbutton keypad, Matter connectivity, and Google Home compatibility for smart security.
    See all Smart Door Locks
    Your price for this item is $153.99
    Save $36
    The previous price was $189.99

  8. Ring - Alarm Range Extender (2nd Gen) - White

    SKU: J36CLVSCHQ

    Product Description

    A white plug-in extender that boosts connectivity between your Ring Alarm Base Station and its components.
    See all Wi-Fi Extenders
    Your price for this item is $14.99
    Save $10
    The previous price was $24.99

  9. Viper - 1-Way Security System with Keyless Entry (Remote Start Not Included) - Installation Included

    SKU: J7GGXLVGCH

    Product Description

    A comprehensive car security system featuring a 6-tone siren, shock sensor, keyless entry, and installation included.
    See all Remote Start & Security Systems
    Your price for this item is $299.99

  10. SimpliSafe - Smoke & Carbon Monoxide Alarm Listener - White

    SKU: J362VFSG67

    Product Description

    A white listener that connects to existing detectors for app alerts and professional fire or CO monitoring.
    See all Smoke & Carbon Monoxide Detectors
    Your price for this item is $44.99
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In-store pricing may vary. Prices and offers are subject to change. © 2026 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.