Skip to content
Main Content

warning alarms

No content

Best Buy customers often prefer the following products when searching for warning alarms.

A warning alarm is a device that alerts you to danger or an event before it occurs. These alarms are often used in industrial settings, but they can also be used to alert you to a fire, an intruder, or other emergencies. Browse the top-ranked list of warning alarms below along with associated reviews and opinions.

Main Results
  1. SimpliSafe - Indoor Home Security System (8-piece) - White - Front_Zoom
    Top comment

    "good simple alarm...Good alarm, simple to install, decent monthly plan...Solid Alarm System...We really like this alarm system - easy to install and operate and you can choose to opt into monitoring."

    See all customer reviews

    Product Description

    SimpliSafe delivers advanced security solutions that put you, your home, and your safety first. With optional professional monitoring powered by Fast Protect Technology, SimpliSafe combines innovative hardware with advanced AI and real people — for 24/7 professional monitoring that delivers fast emergency response when you need it most. The award-winning SimpliSafe system is effective, intuitive, and affordable – so that home can be safe and secure for everyone. You can protect every inch of your home. SimpliSafe has sensors for every room, window and door. HD security cameras for inside and out. Smarter ways to detect motion that alert you only when a threat is real. Hazard sensors that detect floods, and other threats to your home. Powerful sirens that can help stop intruders in their tracks. And, it’s backed by optional 24/7 professional monitoring—experts who are ready to dispatch emergency help immediately. That’s the unmatched combination that separates SimpliSafe Home Security from the others. At SimpliSafe, we believe everyone deserves to feel safe at home. That's why our bundles are designed to be effective yet affordable. And with no long-term contracts or hidden fees. This 8-piece wireless security bundle provides 24/7 protection. The Base Station is the brains of the system. It sends alarm signals to the monitoring center with a built-in cellular connection and includes a back up battery that lasts up to 24 hours and a loud, 95 dB siren. The smash-safe Keypad is soft to the touch, easy to use during the day and night, and requires no plug so it can be placed anywhere. Entry Sensors (4 total) protect your doors, windows, and cabinets and are designed to blend into the background. And Motion Sensors (2 total) are designed for human detection, not pet detection. Advanced security, whole home protection. There's no safe like SimpliSafe.
    See all Home Security Systems
    Top comment

    "good simple alarm...Good alarm, simple to install, decent monthly plan...Solid Alarm System...We really like this alarm system - easy to install and operate and you can choose to opt into monitoring."

    See all customer reviews

    Product Description

    SimpliSafe delivers advanced security solutions that put you, your home, and your safety first. With optional professional monitoring powered by Fast Protect Technology, SimpliSafe combines innovative hardware with advanced AI and real people — for 24/7 professional monitoring that delivers fast emergency response when you need it most. The award-winning SimpliSafe system is effective, intuitive, and affordable – so that home can be safe and secure for everyone. You can protect every inch of your home. SimpliSafe has sensors for every room, window and door. HD security cameras for inside and out. Smarter ways to detect motion that alert you only when a threat is real. Hazard sensors that detect floods, and other threats to your home. Powerful sirens that can help stop intruders in their tracks. And, it’s backed by optional 24/7 professional monitoring—experts who are ready to dispatch emergency help immediately. That’s the unmatched combination that separates SimpliSafe Home Security from the others. At SimpliSafe, we believe everyone deserves to feel safe at home. That's why our bundles are designed to be effective yet affordable. And with no long-term contracts or hidden fees. This 8-piece wireless security bundle provides 24/7 protection. The Base Station is the brains of the system. It sends alarm signals to the monitoring center with a built-in cellular connection and includes a back up battery that lasts up to 24 hours and a loud, 95 dB siren. The smash-safe Keypad is soft to the touch, easy to use during the day and night, and requires no plug so it can be placed anywhere. Entry Sensors (4 total) protect your doors, windows, and cabinets and are designed to blend into the background. And Motion Sensors (2 total) are designed for human detection, not pet detection. Advanced security, whole home protection. There's no safe like SimpliSafe.
    See all Home Security Systems
    See all Home Security Systems
  2. SimpliSafe - Smoke Detector - White - Front_Zoom

    Model: SSSD3
    SKU: 6520590
    Top comment

    "Make sure you click it all the way or youll get alarms that their tampered with...These alarms work very well with the simplisafe system!"

    See all customer reviews

    Product Description

    Protect your home and family from fires with the SimpliSafe Smoke Detector that's fully connected to your SimpliSafe Home Security System. You’ll get an instant alert sent to your phone when dangerous levels of smoke are detected. Plus, with a 24/7 Professional Monitoring Plan, the smoke detector alerts our monitoring center in an emergency. That means you’ll get a fast response from firefighters.
    See all Home Security Accessories
    Top comment

    "Make sure you click it all the way or youll get alarms that their tampered with...These alarms work very well with the simplisafe system!"

    See all customer reviews

    Product Description

    Protect your home and family from fires with the SimpliSafe Smoke Detector that's fully connected to your SimpliSafe Home Security System. You’ll get an instant alert sent to your phone when dangerous levels of smoke are detected. Plus, with a 24/7 Professional Monitoring Plan, the smoke detector alerts our monitoring center in an emergency. That means you’ll get a fast response from firefighters.
    See all Home Security Accessories
    See all Home Security Accessories
  3. Sengled - Smart Window & Door Sensor (2-Pack) - White - Front_Zoom
    Top comment

    "Using as an alarm for garage freezer...These sensors are ideal as a warning device for when a door or window is opened or closed. "

    See all customer reviews

    Product Description

    Improve home security with this two-pack of Sengled smart window and door sensors. Featuring simple designs and adhesive backs, these smart sensors are easy to install, set up and pair to compatible hubs. These Sengled smart window and door sensors let you check in at home remotely via the included app.
    See all Door & Window Alarms
    Top comment

    "Using as an alarm for garage freezer...These sensors are ideal as a warning device for when a door or window is opened or closed. "

    See all customer reviews

    Product Description

    Improve home security with this two-pack of Sengled smart window and door sensors. Featuring simple designs and adhesive backs, these smart sensors are easy to install, set up and pair to compatible hubs. These Sengled smart window and door sensors let you check in at home remotely via the included app.
    See all Door & Window Alarms
    See all Door & Window Alarms
  4. Ring - Retrofit Alarm Kit - White - Front_Zoom

    Model: 4AW1SZ-0EN0
    SKU: 6402167
    Top comment

    "i would recommend the Ring Alarm Security kit and if you are looking to replace your old working alarm system with working wired zones, then i would recommend the Ring Alarm Retrofit kit (see my review on the Ring Alarm Security kit)...Great solution to swapping alarm system....I converted my old alarm system over to Ring using the retrofit system. "

    See all customer reviews

    Product Description

    Have a wired alarm system? Make it smart with Ring Retrofit Kit – a wired-to-wireless bridge that conveniently connects your existing hardwired contact sensors to your Ring Alarm. Wire up to 8 zones with one Retrofit Alarm Kit (Note: not for use with wired smoke or CO detectors or existing keypads) then control it all from the free Ring App. Receive mobile notifications when connected wired zones are opened. Arm and disarm your system with a simple tap. Even manage all your Ring Video Doorbells, Cameras and Alarm devices from one simple dashboard. *Existing wired contact zones must be in good working order.
    See all Home Security Accessories
    Top comment

    "i would recommend the Ring Alarm Security kit and if you are looking to replace your old working alarm system with working wired zones, then i would recommend the Ring Alarm Retrofit kit (see my review on the Ring Alarm Security kit)...Great solution to swapping alarm system....I converted my old alarm system over to Ring using the retrofit system. "

    See all customer reviews

    Product Description

    Have a wired alarm system? Make it smart with Ring Retrofit Kit – a wired-to-wireless bridge that conveniently connects your existing hardwired contact sensors to your Ring Alarm. Wire up to 8 zones with one Retrofit Alarm Kit (Note: not for use with wired smoke or CO detectors or existing keypads) then control it all from the free Ring App. Receive mobile notifications when connected wired zones are opened. Arm and disarm your system with a simple tap. Even manage all your Ring Video Doorbells, Cameras and Alarm devices from one simple dashboard. *Existing wired contact zones must be in good working order.
    See all Home Security Accessories
    See all Home Security Accessories
  5. SimpliSafe - 4pack Entry Sensor - White - Front_Zoom
    Top comment

    "This can’t be cleared from the app, it has to be cleared from the keypad. As it warns you that a door is opened when setting it away mode or home....Purchased my mom a alarm system and she needed a couple extra entry alarms and best buy was cheaper then buying off there website. "

    See all customer reviews

    Product Description

    Easy to install on every type of door or window. The magnet goes on the door or window, and the sensor goes on the frame (or vice versa). Magnet can be placed up to 2 inches from the sensor, so sensors fit on all types of doors and windows. SimpliSafe sensors come with the battery pre-installed and adhesive tape pre-applied, making set-up a snap.
    See all Door & Window Alarms
    Top comment

    "This can’t be cleared from the app, it has to be cleared from the keypad. As it warns you that a door is opened when setting it away mode or home....Purchased my mom a alarm system and she needed a couple extra entry alarms and best buy was cheaper then buying off there website. "

    See all customer reviews

    Product Description

    Easy to install on every type of door or window. The magnet goes on the door or window, and the sensor goes on the frame (or vice versa). Magnet can be placed up to 2 inches from the sensor, so sensors fit on all types of doors and windows. SimpliSafe sensors come with the battery pre-installed and adhesive tape pre-applied, making set-up a snap.
    See all Door & Window Alarms
    See all Door & Window Alarms
  6. Ring - Alarm Glass Break Sensor (2-Pack) - White - Front_Zoom
    Top comment

    "I really like the Ring glass alarm; it works very well when I drop a metal bowl or make any loud sound like glasses, the alarm is on right away....They connected to the alarm easily."

    See all customer reviews

    Product Description

    Monitor glass windows and doors for break-in attempts with Ring Alarm Glass Break Sensor. Using AI technology, the sensor detects the sound of glass breaking up to 25 feet. You’ll receive notifications whenever breaking glass is detected, or receive a call from our monitoring center if you have enrolled in professional monitoring* with a Ring Protect Pro subscription, sold separately.** Requires Ring Alarm or Ring Alarm Pro, both sold separately.
    See all Door & Window Alarms
    Top comment

    "I really like the Ring glass alarm; it works very well when I drop a metal bowl or make any loud sound like glasses, the alarm is on right away....They connected to the alarm easily."

    See all customer reviews

    Product Description

    Monitor glass windows and doors for break-in attempts with Ring Alarm Glass Break Sensor. Using AI technology, the sensor detects the sound of glass breaking up to 25 feet. You’ll receive notifications whenever breaking glass is detected, or receive a call from our monitoring center if you have enrolled in professional monitoring* with a Ring Protect Pro subscription, sold separately.** Requires Ring Alarm or Ring Alarm Pro, both sold separately.
    See all Door & Window Alarms
    See all Door & Window Alarms
  7. Ring - Quick Release Rechargeable Lithium-ion Battery for Select Devices - Front_Zoom
    Top comment

    "Bought as back up since I do not have the Ring doorbell hooked up to the old doorbell wiring. When I get warning that battery is low I charge the second battery up and then just replace....Not sure if there is a warning when the battery is getting low on power, but if not, Ring should consider adding this to the door bell system."

    See all customer reviews

    Product Description

    The Quick-Release Battery Pack allows you to have backup power for select battery powered Ring Doorbells and Cameras. To charge your battery pack, simply connect it to a micro-USB cord and plug it into a power outlet. If the battery pack in compatible Ring Video Doorbell or Securtiy Cam runs out of power, you can remove your batteries by pressing the quick-release tab on the battery pack. Then, simply slide your second battery pack into your device, and you’re good to go.
    See all Home Security Accessories
    Top comment

    "Bought as back up since I do not have the Ring doorbell hooked up to the old doorbell wiring. When I get warning that battery is low I charge the second battery up and then just replace....Not sure if there is a warning when the battery is getting low on power, but if not, Ring should consider adding this to the door bell system."

    See all customer reviews

    Product Description

    The Quick-Release Battery Pack allows you to have backup power for select battery powered Ring Doorbells and Cameras. To charge your battery pack, simply connect it to a micro-USB cord and plug it into a power outlet. If the battery pack in compatible Ring Video Doorbell or Securtiy Cam runs out of power, you can remove your batteries by pressing the quick-release tab on the battery pack. Then, simply slide your second battery pack into your device, and you’re good to go.
    See all Home Security Accessories
    See all Home Security Accessories
  8. Arlo - Safe Family Bundle – 1-Year Safe Family Plan and 2 Safe Button Accessories - White - Angle_Zoom
    Top comment

    "Personal Alarm...Keeps you safe was a bargain when bundled just keeps warning you when your phone moves to far away from the device"

    See all customer reviews

    Product Description

    Arlo Safe is here to bring you peace of mind with safety on the go. With one tap emergency activation on your phone, it’s like having a security guard by your side. If you feel in danger, you can alert professional security experts to send first responders to your location. You can also check in with family members to see their location and ensure their well-being. If you’re ever in a car accident, automatic auto crash detection will alert security experts to send emergency services to your location. Triple redundant, five diamond, and UL certified monitoring centers ensure you get an immediate response from medically trained, live security experts. Use the included Arlo Safe Button accessory to discreetly alert 24/7 Live Security Experts during an emergency with one tap.¹ Clip it onto a backpack, keychain, or a purse for easy access. ¹Requires cellphone connection.
    See all Home Security Accessories
    Top comment

    "Personal Alarm...Keeps you safe was a bargain when bundled just keeps warning you when your phone moves to far away from the device"

    See all customer reviews

    Product Description

    Arlo Safe is here to bring you peace of mind with safety on the go. With one tap emergency activation on your phone, it’s like having a security guard by your side. If you feel in danger, you can alert professional security experts to send first responders to your location. You can also check in with family members to see their location and ensure their well-being. If you’re ever in a car accident, automatic auto crash detection will alert security experts to send emergency services to your location. Triple redundant, five diamond, and UL certified monitoring centers ensure you get an immediate response from medically trained, live security experts. Use the included Arlo Safe Button accessory to discreetly alert 24/7 Live Security Experts during an emergency with one tap.¹ Clip it onto a backpack, keychain, or a purse for easy access. ¹Requires cellphone connection.
    See all Home Security Accessories
    See all Home Security Accessories
  9. Ring - Alarm Panic Button (2nd Gen) - White - Front_Zoom

    Model: B09NXDQ5YM
    SKU: 6521445

    Product Description

    Sound the alarm, notify loved ones*, and request emergency help when you need it with Alarm Panic Button (subscription required, sold separately). You can press and hold the Panic Button for three seconds to sound the siren on your Ring Alarm. Subscribe to Ring Protect, sold separately, to also alert shared users when your Panic Button is pressed with notifications from the Ring App.* Opt into 24/7 Professional Monitoring with a Ring Protect Pro subscription, sold separately, to notify our monitoring center and request emergency responders when your Panic Button is pressed.** BATTERY WARNING: KEEP OUT OF REACH OF CHILDREN. Store spare batteries securely. Dispose of used batteries immediately and safely. If you think batteries might have been swallowed or placed inside any part of the body, seek immediate medical attention.
    See all Home Security Accessories

    Product Description

    Sound the alarm, notify loved ones*, and request emergency help when you need it with Alarm Panic Button (subscription required, sold separately). You can press and hold the Panic Button for three seconds to sound the siren on your Ring Alarm. Subscribe to Ring Protect, sold separately, to also alert shared users when your Panic Button is pressed with notifications from the Ring App.* Opt into 24/7 Professional Monitoring with a Ring Protect Pro subscription, sold separately, to notify our monitoring center and request emergency responders when your Panic Button is pressed.** BATTERY WARNING: KEEP OUT OF REACH OF CHILDREN. Store spare batteries securely. Dispose of used batteries immediately and safely. If you think batteries might have been swallowed or placed inside any part of the body, seek immediate medical attention.
    See all Home Security Accessories
    See all Home Security Accessories
  10. Ring - Alarm Panic Button (2nd Gen) (2-Pack) - White - Front_Zoom

    Product Description

    Sound the alarm, notify loved ones*, and request emergency help when you need it with Alarm Panic Button (subscription required, sold separately). You can press and hold the Panic Button for three seconds to sound the siren on your Ring Alarm. Subscribe to Ring Protect, sold separately, to also alert shared users when your Panic Button is pressed with notifications from the Ring App.* Opt into 24/7 Professional Monitoring with a Ring Protect Pro subscription, sold separately, to notify our monitoring center and request emergency responders when your Panic Button is pressed.** BATTERY WARNING: KEEP OUT OF REACH OF CHILDREN. Store spare batteries securely. Dispose of used batteries immediately and safely. If you think batteries might have been swallowed or placed inside any part of the body, seek immediate medical attention.
    See all Home Security Accessories

    Product Description

    Sound the alarm, notify loved ones*, and request emergency help when you need it with Alarm Panic Button (subscription required, sold separately). You can press and hold the Panic Button for three seconds to sound the siren on your Ring Alarm. Subscribe to Ring Protect, sold separately, to also alert shared users when your Panic Button is pressed with notifications from the Ring App.* Opt into 24/7 Professional Monitoring with a Ring Protect Pro subscription, sold separately, to notify our monitoring center and request emergency responders when your Panic Button is pressed.** BATTERY WARNING: KEEP OUT OF REACH OF CHILDREN. Store spare batteries securely. Dispose of used batteries immediately and safely. If you think batteries might have been swallowed or placed inside any part of the body, seek immediate medical attention.
    See all Home Security Accessories
    See all Home Security Accessories
No content
No content