# First Alert BRK SC9120FF Smoke & CO Detector *Published: 2025-01-06 | Updated: 2025-02-15 | Source: https://shopsavvy.com/products/first-alert-brk-sc9120ff-smoke-and-co-detector* --- **Brand:** First Alert **Price Range:** $14.99 - $79.98 across 16 retailers ## Pros - Reliable and well-reviewed brand, known for providing quality smoke detectors. - Easy installation with mounting holes compatible with any electrical box size. - Works efficiently and has a straightforward operation. - Includes a long-lasting backup battery for added security during power outages. - Offers an aesthetically pleasing design. - Quick and responsive customer service, available for troubleshooting and assistance. - Installation does not require changes to wiring or mounting brackets. - Newer units manufactured in 2023, ensuring a longer lifespan. - Easily linked with existing smoke detectors for comprehensive coverage. ## Cons - Short lifespan with multiple replacements needed for units installed since 2008. - Battery replacement is complicated due to a poorly designed battery compartment. - Flimsy compartment doors that frequently break when trying to replace the battery. - Troubleshooting directions can be complex for non-professionals. - "Three beep" failure signal indicates the need for unit replacement, which can be costly over time. ## Specifications | Attribute | Value | |-----------|-------| | model | SC9120FF | | brand | First Alert | | color | White | | sku | 1 pack | | dimensionsUnit | cm | | weight | N/A | | powerSource | Hardwired with Battery Backup | | monthOfManufacture | March | | yearOfManufacture | 2023 | | installType | Hardwired | ## About This Product The BRK SC9120B hardwire combination smoke and carbon monoxide alarm detects two hazards with one simple unit. Carbon monoxide (CO) is a colorless, odorless, deadly gas. It can be emitted by sources including gas or oil furnaces, gas clothes dryers, water heaters, fireplaces, wood stoves, charcoal grills, gas ranges, and space heaters. A clogged chimney, improper venting, and attached garages can also cause carbon monoxide accumulation. The BRK SC9120 hardwire combination smoke and CO alarm with battery backup includes these features: Quick plug in power connector for easy installation, 120 volt AC inter connectable (with maximum 18 compatible devices 12 other compatible smoke alarms + 6 compatible devices like bells, horns, repeaters and door closers. If one unit triggers an alarm, all smoke alarms in the series will sound. Single test/silence button which both silences a non-threatening alarm or low battery warning and allows you to test the unit's functionality. Automatically perfor... ## Last Seen Prices | Retailer | Price | Availability | Last seen | |----------|-------|-------------|-----------| | [Pro source shop](https://shopsavvy.com/api/redirect/products/yekSuyHCyK1dNFViV3wn/offers/a56f926e-ac77-37e1-9f65-d0e6209251fd?source=shopsavvy&medium=product-page) | $14.99 | In Stock | 2025-02-15 (may have changed) | | [Amazon](https://shopsavvy.com/api/redirect/products/yekSuyHCyK1dNFViV3wn/offers/nhMMiiRO4nD1DJ50dxJV?source=shopsavvy&medium=product-page) | $29.95 | In Stock | 2023-08-01 (may have changed) | | [Mercari](https://shopsavvy.com/api/redirect/products/yekSuyHCyK1dNFViV3wn/offers/9c3da216-a0ab-3a3e-3a35-2016c3602d25?source=shopsavvy&medium=product-page) | $35.00 | In Stock | 2024-03-13 (may have changed) | | [Electric Bargain Store](https://shopsavvy.com/api/redirect/products/yekSuyHCyK1dNFViV3wn/offers/bcD25upjwUdsbnBlqUzq?source=shopsavvy&medium=product-page) | $35.98 | In Stock | 2022-08-15 (may have changed) | | [Bonanza](https://shopsavvy.com/api/redirect/products/yekSuyHCyK1dNFViV3wn/offers/4bjDKkegU20LChHHuTnV?source=shopsavvy&medium=product-page) | $37.61 | In Stock | 2023-07-16 (may have changed) | | [Smoke Alert Home Fire Safety](https://shopsavvy.com/api/redirect/products/yekSuyHCyK1dNFViV3wn/offers/U9m6TvcnTZB53Qhgdczk?source=shopsavvy&medium=product-page) | $38.95 | In Stock | 2022-08-15 (may have changed) | | [Exit 15 Corporation](https://shopsavvy.com/api/redirect/products/yekSuyHCyK1dNFViV3wn/offers/SP3sbd5r6PBg1z5slW2J?source=shopsavvy&medium=product-page) | $40.50 | In Stock | 2023-07-20 (may have changed) | | [Exit 15 Corporation](https://shopsavvy.com/api/redirect/products/yekSuyHCyK1dNFViV3wn/offers/olrn07daMeFbcT8iDOQ7?source=shopsavvy&medium=product-page) | $40.50 | In Stock | 2022-08-15 (may have changed) | | [PCTechSupply](https://shopsavvy.com/api/redirect/products/yekSuyHCyK1dNFViV3wn/offers/bTXw7I7zG9X6ZdSu405A?source=shopsavvy&medium=product-page) | $41.73 | In Stock | 2023-07-13 (may have changed) | | [Wholesale Home](https://shopsavvy.com/api/redirect/products/yekSuyHCyK1dNFViV3wn/offers/EuOnHVUmV6i4RkA6TPJD?source=shopsavvy&medium=product-page) | $43.99 | In Stock | 2025-02-15 (may have changed) | | [Market America Brands / Shop.com](https://shopsavvy.com/api/redirect/products/yekSuyHCyK1dNFViV3wn/offers/blgBrLrK7mED58BQQbPh?source=shopsavvy&medium=product-page) | $46.40 | In Stock | 2023-03-07 (may have changed) | | [Neobits.com](https://shopsavvy.com/api/redirect/products/yekSuyHCyK1dNFViV3wn/offers/P7pYNCJbJL0MbUq8KaVY?source=shopsavvy&medium=product-page) | $51.95 | In Stock | 2023-07-20 (may have changed) | | [Walmart](https://shopsavvy.com/api/redirect/products/yekSuyHCyK1dNFViV3wn/offers/o1mgmUTzTIXwc4XqTDSj?source=shopsavvy&medium=product-page) | $53.72 | In Stock | 2023-06-21 (may have changed) | | [Electric Bargain Store](https://shopsavvy.com/api/redirect/products/yekSuyHCyK1dNFViV3wn/offers/KuiQdARcSIgAYGL4KE7h?source=shopsavvy&medium=product-page) | $57.38 | In Stock | 2025-02-15 (may have changed) | | [PlumbersStock.com](https://shopsavvy.com/api/redirect/products/yekSuyHCyK1dNFViV3wn/offers/i6vuyWy43bjl26YLjn6o?source=shopsavvy&medium=product-page) | $66.27 | In Stock | 2023-07-13 (may have changed) | | [JBJ Supply](https://shopsavvy.com/api/redirect/products/yekSuyHCyK1dNFViV3wn/offers/wMoqxaAsbg20gowzsWck?source=shopsavvy&medium=product-page) | $79.98 | In Stock | 2023-07-13 (may have changed) | [See every retailer and the full price history on ShopSavvy](https://shopsavvy.com/products/first-alert-brk-sc9120ff-smoke-and-co-detector) --- *About this page: ShopSavvy compares prices across thousands of retailers, aggregates expert and user reviews, and tracks price history to help you make informed buying decisions. Prices are collected from retailer listings; the Current Prices table shows the date each price was last seen.* *Machine-readable access: append `.md` to any ShopSavvy URL, or send `Accept: text/markdown`, to get this page as Markdown. For the same catalogue as structured JSON — product lookup by barcode/ASIN/URL, live prices across retailers, and price history — see ShopSavvy's MCP server at https://shopsavvy.com/agents and the Data API at https://shopsavvy.com/data.*