First Alert
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First Alert Hardwire Combination Smoke & Carbon Monoxide Alarm
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First Alert Hardwire Combination Smoke & Carbon Monoxide Alarm
Easily install and interconnect multiple alarms together to create an alarm system throughout your home.
First Alert Hardwire Combination Smoke & Carbon Monoxide Alarm
Item #: 90594040

First Alert Hardwire Combination Smoke & Carbon Monoxide Alarm

86% of respondents would recommend this to a friend

Item #: 90594040

USD 286

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*All items will import from US

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Order now and get it around Wednesday, October 14
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Easily install and interconnect multiple alarms together to create an alarm system throughout your home.
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What Stands Out

Hardwired Reliability
The First Alert BRK SC9120B-6 offers consistent power and safety assurance with a hardwired design that eliminates the need for battery changes, ensuring maximum protection at all times.
Battery Backup
Equipped with a battery backup, this detector maintains functionality during power outages, ensuring continued monitoring for smoke and carbon monoxide, providing peace of mind for your family.
6-Pack Value
With six units included, this package provides comprehensive coverage for larger homes, delivering exceptional value and enhanced safety across multiple rooms, making it a smart investment for family protection.

Product Details

Shop First Alert Hardwire Combination Smoke & Carbon Monoxide Alarm online at a best price in Palau. B0DJRL56N9
BrandFirst Alert
Model NumberSMICO100-AC
Unit Count6 Count
Number of Items6
Item HighlightSMICO100-AC, 9V Battery Backup
ManufacturerResideo
UPC029054022783
Built-In MediaEasy Adapter Plug, 9V Battery
Item Type NameCombination Alarm
Mfr Part NumberSMICO100-AC
Power SourceCorded Electric
AlarmSmoke, CO
Sensor TypeIonization
Operating Humidity10-95% RH
Product StylePrecision Detection
ColorWhite
Item Dimensions D x W x H5.6"D x 5.6"W x 1.9"H (14.2 x 14.2 x 4.8 cm)
Item Weight3.3 pounds (1.5 kg)
StylePrecision Detection
Product Dimensions (L x W x H)5.6"D x 5.6"W x 1.9"H (14.2 x 14.2 x 4.8 cm)

Who Should Buy?

Suitable For
  • Homeowners

    Ideal for homeowners who want reliable smoke and CO detection for enhanced safety in their residences.

  • Parents

    Perfect for parents seeking peace of mind with advanced detection systems for their children's safety.

  • Landlords

    Suitable for landlords needing a compliant and reliable smoke and CO detection solution in rental units.

Not Suitable For
  • Urban Dwellers

    May not suit those living in apartments where hardwired installations are less common or impractical.

Product Description

First Alert Hardwire Combination Smoke & Carbon Monoxide Alarm

Have any Query? Chat with us

Customer Questions & Answers

  • Question: What features does the FIRST ALERT BRK SC9120FF Smoke and Carbon Monoxide Detector offer?

    Answer: The FIRST ALERT BRK SC9120FF features both smoke and carbon monoxide detection, providing comprehensive safety in one device. It uses an advanced photoelectric sensor that helps minimize false alarms while ensuring swift detection of smoke and CO levels. The hardwired design offers reliable connectivity, and the battery backup ensures the device functions even during power outages. This combination makes it an ideal choice for homes where safety and reliability are paramount.
  • Question: How does the battery backup work in the FIRST ALERT SC9120FF model?

    Answer: The battery backup in the FIRST ALERT SC9120FF ensures that the detector operates even when there's a power failure. It uses a 9V battery that automatically activates when the hardwired power source is interrupted. This feature is crucial for homeowners who may experience sudden outages, ensuring constant protection against smoke and carbon monoxide exposure, especially during night hours or severe weather conditions.
  • Question: What is the lifespan of the FIRST ALERT BRK SC9120FF detector?

    Answer: Typically, smoke and CO detectors like the FIRST ALERT BRK SC9120FF have a lifespan of about 10 years, after which they should be replaced. The device includes a 'replace by' date marked on the back for user convenience. Regularly checking the device’s functionality, performing monthly tests, and adhering to the replacement timeline will enhance safety in your home, ensuring your family remains protected from potential hazards.
  • Question: Is the FIRST ALERT SC9120FF easy to install?

    Answer: Yes, the FIRST ALERT SC9120FF is designed for straightforward installation. As a hardwired model, it connects directly to your home’s electrical system, which may require a qualified electrician if you are unfamiliar with electrical work. The unit comes with an easy-to-follow installation guide, making it manageable for DIY enthusiasts. Proper placement is key, so consider installing it near sleeping areas to ensure timely alerts if danger arises.
  • Question: What makes the photoelectric sensor important in detecting smoke?

    Answer: The photoelectric sensor in the FIRST ALERT SC9120FF is specifically designed to detect smoldering fires, which typically produce more smoke than flames initially. This type of sensor reacts quicker to slow-burning flames, providing earlier alerts and allowing more time for residents to evacuate. Its enhanced sensitivity reduces the likelihood of false alarms from cooking smoke, widely recognized as a common nuisance with other detectors.
  • Question: Can I interconnect multiple FIRST ALERT SC9120FF detectors?

    Answer: Yes, the FIRST ALERT SC9120FF can be interconnected with other compatible smoke and CO detectors. This feature allows alerts to be synchronized, ensuring that if one alarm sounds, all interconnected units will activate. This is particularly beneficial in larger homes where sound coverage is crucial, helping ensure that all residents are alerted, regardless of where they are within the premises.
  • Question: What should I do if the FIRST ALERT SC9120FF alarm goes off?

    Answer: If the FIRST ALERT SC9120FF alarm sounds, first check for signs of smoke or carbon monoxide in the area. Evacuate the premises immediately if dangers are present, and call emergency services. It's important not to ignore the alarm, even if you believe it to be a false alarm, as both smoke and CO can pose severe health risks. Also, familiarize yourself with the sound patterns of your detector for better emergency preparedness.
  • Question: How can I maintain the FIRST ALERT SC9120FF detector for optimal performance?

    Answer: To maintain the FIRST ALERT SC9120FF, regularly test the alarm using the test button to ensure it's functioning correctly. Cleaning the unit with a soft brush or vacuum nozzle can help prevent dust build-up, which may impede sensor performance. It’s also advisable to replace the backup battery annually and keep an eye on the 'replace by' date to ensure your detector continues to provide reliable protection for your home.
  • Question: Does the FIRST ALERT BRK SC9120FF come with any alerts or indicators?

    Answer: Yes, the FIRST ALERT BRK SC9120FF features an LED indicator that visually communicates the operational status, including normal operation, alarm activation, and when the unit requires maintenance or battery replacement. During alarms, the green LED flashes, while red indicates smoke or CO detection. These alerts allow users to quickly assess the situation and respond accordingly, enhancing safety awareness in the home.
  • Question: Where can I buy the FIRST ALERT BRK SC9120FF detector?

    Answer: You can purchase the FIRST ALERT BRK SC9120FF Hardwired Smoke and Carbon Monoxide CO Detector from Ubuy in Palau. Ubuy offers a reliable platform for e-commerce shopping, providing various brands and models along with customer reviews, making it easier to choose the right safety device for your home.

First Alert Combination Smoke & Carbon Monoxide Detectors SMICO100-AC Editorial Review

First Alert Hardwire Combination Smoke & Carbon Monoxide Alarm | SMICO100-AC, 9V Battery Backup provides dual protection against smoke and CO, ensuring comprehensive safety in your home. Users appreciate its seamless integration with existing systems, making installation straightforward and effective in alerting all units when one goes off. The reliable brand reputation adds to its value, giving peace of mind for family protection. Some users noted that it may require a bracket change if replacing older models, but overall feedback indicates satisfaction with its performance and ease of use during installation. Clear instructions and the inclusion of a battery are definite advantages.

Customer Reviews & Ratings

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Pros

  • Combines smoke and carbon monoxide detection
  • Easy installation with existing hardwired systems
  • Alerts all units when one detects danger
  • Includes clear instructions for easy setup
  • Reliable brand known for home safety

Cons

  • Bracket change may be needed for older models

Platform Trust & Buyer Confidence

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4.2/5 9477 reviews
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Jasmin
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“Great products and very good service: very easy and very fast international delivery.”

9 September 2026 · via Trustpilot
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“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
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Hazel
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“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
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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
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Adele
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“Easy to find and order what you want on the website. Delivery is quick to the UK”

8 September 2026 · via Trustpilot
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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.

USD 286

Order now and get it around Wednesday, October 14

QTY:

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

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Fastest cross-border delivery

Features & Benefits

  • Features First Alert's Precision Detection technology for improved safety.
  • Meets new industry standards, minimizing nuisance alarms.
  • Interconnects multiple alarms for comprehensive home protection.
  • Quick Connect Plug enables easy installation without rewiring.
  • Battery backup ensures continuous operation during power outages.
  • Includes test/silence button for effortless system checks.

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