What are the key features of the First Alert BRK 9120B Hardwired Smoke Alarm?

The First Alert BRK 9120B Smoke Alarm comes with both hardwired and battery backup options, ensuring reliable performance even during power outages. It features an ionization smoke sensing technology that responds quickly to fast-flaming fires. Additionally, it includes a tamper-resistant design to prevent unauthorized removal, a 85-decibel alarm, and a convenient test/silence button. This smoke alarm is ideal for ensuring safety in homes and buildings, providing peace of mind with its dependable continuous monitoring and easy installation.

How do I install the First Alert BRK 9120B Hardwired Smoke Alarm?

Installation of the First Alert BRK 9120B is straightforward. You’ll need standard electrical tools to connect the smoke alarm to your home’s electrical system. The unit comes with a mounting bracket that can be attached directly to your ceiling or wall. Ensure to follow the included instructions for wiring the device securely. For best results, install smoke alarms in every bedroom and on each floor of your home, enhancing safety by creating a comprehensive smoke detection network.

What is the importance of having a battery backup in a smoke alarm?

Having a battery backup is crucial in a smoke alarm as it ensures continuous operation during power outages. The First Alert BRK 9120B features a backup battery that kicks in when electrical power is lost, providing an additional layer of safety. This is especially important during emergencies when smoke alarms can be the first line of defense against fire. Regularly testing and replacing the backup battery can enhance the reliability of the device and ultimately contribute to your home's safety.

What maintenance is required for the First Alert BRK 9120B Smoke Alarm?

Routine maintenance for the First Alert BRK 9120B smoke alarm is important for its effectiveness. You should test the alarm monthly using the test button, and clean the unit regularly with a vacuum or a soft cloth to remove dust and debris. Replace the backup battery at least once a year to ensure functionality. If the alarm emits a chirping sound, it's an indication that maintenance is needed, either through cleaning or battery replacement, ensuring that it remains reliable in alerting you during emergencies.

How does the First Alert BRK 9120B handle false alarms?

The First Alert BRK 9120B smoke alarm features a convenient silence button that allows you to temporarily disable the alarm in case of false alarms, such as cooking smoke. This feature is handy for reducing disturbances while maintaining safety during genuine emergencies. It will automatically reset itself after a short period, ensuring you are still protected. For persistent false alarms, consider relocating your smoke alarm away from kitchens or bathrooms, which are common sources of non-threatening smoke.

Can the First Alert BRK 9120B be interconnected with other smoke alarms?

Yes, the First Alert BRK 9120B is designed to be interconnected with other compatible smoke alarms. This means when one unit detects smoke, all interconnected alarms sound simultaneously, providing optimal safety across larger areas such as multi-level homes. This interconnected feature allows for immediate notification in any part of the house, enhancing the alert's reach and ensuring everyone can respond quickly to potential danger.

What kind of smoke does the First Alert BRK 9120B detect?

The First Alert BRK 9120B utilizes ionization technology, making it particularly effective at detecting fast-flaming fires that produce minimal smoke. This includes fires caused by flammable liquids or paper. For optimal safety, consider placing this smoke alarm in areas where such fires are more likely to occur, such as near kitchens or living rooms. For comprehensive protection, pairing it with a photoelectric smoke alarm can enhance detection of smoldering fires.

What is the lifespan of the First Alert BRK 9120B smoke alarm?

The First Alert BRK 9120B smoke alarm is designed for a lifespan of approximately 10 years. After this time, it is essential to replace the alarm to ensure reliable performance. Regularly checking the manufacturing date found on the unit can help you keep track of its lifespan. Proper replacement is key, as older smoke alarms may not function correctly, reducing safety in your home during emergencies.

Is the First Alert BRK 9120B compatible with my home's electrical system?

Yes, the First Alert BRK 9120B is compatible with most standard household electrical systems, usually requiring a 120V power source. It also has a 9V battery backup for reliable operation during outages. Ensure to check your existing wiring and follow the installation instructions closely for proper configuration. If there are any specific concerns about compatibility, consulting a qualified electrician prior to installation can provide additional assurance.

Where can I buy the First Alert BRK 9120B Hardwired Smoke Alarm with Battery Backup?

You can conveniently purchase the First Alert BRK 9120B Hardwired Smoke Alarm with Battery Backup from Ubuy in Wallis and Futuna Islands. Ubuy offers a selection of smoke alarms to ensure your home is equipped with the necessary safety measures. Their platform makes it easy to find reliable products that best fit your needs while also providing detailed product descriptions and customer feedback to guide your purchase.

How to Shop Hardwire Smoke Alarm with Battery Backup SM6W01 Online From Ubuy?

It’s easy to shop Hardwire Smoke Alarm with Battery Backup SM6W01 online from Ubuy. You just have to search for the product, choose your shipping method while checking out and get it delivered to your location.

Is Hardwire Smoke Alarm with Battery Backup SM6W01 Available to Shop Online in Wallis and Futuna Islands?

Yes, at Ubuy Wallis and Futuna Islands this product is available for you to shop at a reasonable price. The Hardwire Smoke Alarm with Battery Backup SM6W01 is not available locally but you can trust us with our express shipping services.

How Long Does It Take to Get Product After Placing the Order?

The delivery time of your ordered product varies as per what you've ordered and the shipping method that you've chosen. The estimated delivery time is mentioned during the checkout process, so be carefree while shopping.

First Alert

Hardwire Smoke Alarm with Battery Backup SM6W01 (3-Pack)

Stay protected with the First Alert BRK 9120B, featuring tamper-resistant pins and a loud 85dB alarm!

First Alert

Item #: 90950429

Hardwire Smoke Alarm with Battery Backup SM6W01 (3-Pack)

90% of respondents would recommend this to a friend

Item #: 90950429

XPF 8334

Price Details

Excluding Shipping & Custom charges ( Shipping and custom charges will be calculated on checkout )

^{*All items will import from US}

Availability : In stock

Imported from USA store

QTY:

Order now and get it around Thursday, October 29

Secured transaction

Our Top Logistics Partners

Stay protected with the First Alert BRK 9120B, featuring tamper-resistant pins and a loud 85dB alarm!

U-Care Warranty:

None

Select a Plan

Fast
Shipping

Free
Return^*

Secure Packaging

100% Original Products

PCI DSS Compliance

ISO 27001 Certified

Note: Step 1 Voltage Transformer required for using electronics products of US store (110-120). Recommended power converters Buy Now.

What Stands Out

Hardwired System

The First Alert BRK 9120B is hardwired for reliability, ensuring constant power supply during emergencies while reducing the need for frequent battery replacements.

Battery Backup

Equipped with a battery backup, this smoke alarm guarantees continued operation even during power outages, providing additional peace of mind for your family's safety.

Smart Design

Featuring a sleek, modern design, the First Alert BRK 9120B seamlessly integrates into any home decor while offering advanced smoke detection technology to enhance overall protection.

Product Details

Brand	First Alert
Model Number	9120B
Unit Count	3 Count
Number of Items	3
Item Highlight	Smoke Detector Hardwired Alarm with Battery Backup, 3-Pack
Manufacturer	first alert
UPC	029054246707
Built-In Media	battery
Mfr Part Number	SM6W01
Power Source	Corded Electric
Alarm	Audible
Sensor Type	Ionization
Product Style	3-Pack
Color	White
Item Dimensions D x W x H	6"D x 2"W x 6"H (15.2 x 5.1 x 15.2 cm)
Item Weight	16 ounces (453.6 grams)
Style	3-Pack
Product Dimensions (L x W x H)	6"D x 2"W x 6"H (15.2 x 5.1 x 15.2 cm)

Dangerous Goods

To avoid the delay in customs clearance process for Dangerous Goods, the shipment shall be opened at our warehouse facility to check the severity of hazardous components. Please see the list of Dangerous goods here.

Who Should Buy?

Homeowners
Ideal for homeowners seeking reliable smoke detection with hardwired options and battery backup for added safety.
Landlords
Perfect for landlords wanting to ensure tenant safety with effective smoke alarms that meet regulatory standards.
Families
A great choice for families needing dependable smoke alarms to protect children and loved ones from fire hazards.

Renters
Not suitable for renters in apartments where installation of hardwired alarms is restricted or disallowed.

Product Description

Hardwire Smoke Alarm with Battery Backup SM6W01 (3-Pack)

Have any Query? Chat with us

Customer Questions & Answers

Question: How to Shop Hardwire Smoke Alarm with Battery Backup SM6W01 Online From Ubuy?

Answer: It’s easy to shop Hardwire Smoke Alarm with Battery Backup SM6W01 online from Ubuy. You just have to search for the product, choose your shipping method while checking out and get it delivered to your location.
Question: Is Hardwire Smoke Alarm with Battery Backup SM6W01 Available to Shop Online in Wallis and Futuna Islands?

Answer: Yes, at Ubuy Wallis and Futuna Islands this product is available for you to shop at a reasonable price. The Hardwire Smoke Alarm with Battery Backup SM6W01 is not available locally but you can trust us with our express shipping services.
Question: How Long Does It Take to Get Product After Placing the Order?

Answer: The delivery time of your ordered product varies as per what you've ordered and the shipping method that you've chosen. The estimated delivery time is mentioned during the checkout process, so be carefree while shopping.

First Alert Smoke Detectors & Fire Alarms 9120B Editorial Review

The Hardwire Smoke Alarm with Battery Backup SM6W01 comes in a convenient 3-Pack, ideal for replacing older smoke detectors around your home. Customers have praised its easy installation process, with reports of a perfect match to existing setups without the need for rewiring. It features a reliable ionization sensor and a battery backup to ensure your safety. Users noted that the alarms have been functioning well after installation, indicating good build quality and reliability from the First Alert brand. This smoke alarm not only provides peace of mind but also integrates smoothly into your existing alarm system.

Customer Reviews & Ratings

5.0

1 customers ratings

5 Star

100%
4 Star

0%
3 Star

0%
2 Star

0%
1 Star

0%

Review this product

Share your thoughts with other customers

Pros

Easy installation without rewiring needed
Includes battery backup for added security
Great fit for replacing old detectors
Ionization sensor for better smoke detection
Built with durable materials for longevity

Cons

May require additional units for larger spaces

Platform Trust & Buyer Confidence

4.2/5 9704 reviews

Read reviews

Jasmin

Verified buyer

“Great products and very good service: very easy and very fast international delivery.”

9 September 2026 · via Trustpilot

Anke

Verified buyer

“Wonderful online shopping experience, smooth transaction from the start. Payment method works conveniently and delivery is unexpectedly fast and reliable. You go the extra mile for service. What makes this even more amazing, you deliver to Namibia. I will remain a happy Ubuy customer and will increase my purchases for sure! Thank you!”

10 September 2026 · via Trustpilot

Hazel

Verified buyer

“Very easy to find the products what you need, and so fast delivery, that’s why I highly recommended to others costumers to used ubuy.”

10 September 2026 · via Trustpilot

Opaleye

Verified buyer

“I received exactly what I ordered I was skeptical about your site because that was my first time to order. But the order came timely and neatly packaged. I was not disappointed. Thank you.”

11 September 2026 · via Trustpilot

Adele

Verified buyer

“Easy to find and order what you want on the website. Delivery is quick to the UK”

8 September 2026 · via Trustpilot

WHY SHOP WITH US

Secure Checkout Global Delivery Easy Returns Genuine Products

Product Price History

Important information

Limitations : For products shipped internationally, please note that any manufacturer warranty may not be valid; manufacturer service options may not be available; product manuals, instructions, and safety warnings may not be in destination country languages; the products (and accompanying materials) may not be designed in accordance with destination country standards, specifications, and labeling requirements; and the products may not conform to destination country voltage and other electrical standards (requiring use of an adapter or converter if appropriate). The recipient is responsible for assuring that the product can be lawfully imported to the destination country. When ordering from Ubuy or its affiliates, the recipient is the importer of record and must comply with all laws and regulations of the destination country.
Not all the products listed on Ubuy are for sale, as Ubuy is a global search engine. Products are subject to export/trade regulations.

XPF 8334

Order now and get it around Thursday, October 29

QTY:

Secured transaction

PCI DSS compliant and ISO 27001:2022 certified, with encrypted payments and full buyer protection on every order.

Our Top Logistics Partners

Fastest cross-border delivery

Features & Benefits

Hardwired smoke alarm with reliable battery backup.
Tamper-resistant locking pins for added security.
Single button for easy silence and test.
Loud 85dB alarm for effective warning.
Continues to function during power outages.
Essential safety device for every household.

Ubuy Assurance

Experience worry-free shopping with 100% original products, PCI DSS-compliant payment security, ISO 27001-certified data protection, the fastest cross-border delivery, free returns ^*, and secure packaging on every order.

Hardwire Smoke Alarm with Battery Backup SM6W01 (3-Pack)

XPF 8334

Fast Shipping

Free Return*

Secure Packaging

100% Original Products

PCI DSS Compliance

ISO 27001 Certified

What Stands Out

Product Details

Dangerous Goods

Who Should Buy?

Product Description

Customer Questions & Answers

First Alert Smoke Detectors & Fire Alarms 9120B Editorial Review

Customer Reviews & Ratings

Review this product

Pros

Cons

Platform Trust & Buyer Confidence

WHY SHOP WITH US

Product Price History

Important information

XPF 8334

Features & Benefits

Ubuy Assurance

Fast
Shipping

Free
Return^*