# First Alert Smoke & Carbon Monoxide Alarm with Battery Backup *Published: 2024-12-10 | Updated: 2025-01-25 | Source: https://shopsavvy.com/products/first-alert-smoke-and-carbon-monoxide-alarm-with-battery-backup* --- **Brand:** BRK Brands **Price Range:** $11.37 - $117.65 across 162 retailers ## Pros - Straightforward installation process, especially for existing First Alert models. - Clear instructions provided along with necessary components like batteries and wiring adapters. - Reliable dual functionality for detecting smoke and carbon monoxide. - Battery backup feature ensures continuous protection during power outages. - Reasonable price, particularly when purchased in multi-packs. - High consumer satisfaction regarding longevity and features like dust covers. ## Cons - Minor challenges with wiring during installation. - Need for potential buyers to verify compatibility with existing wiring systems. ## Specifications | Attribute | Value | |-----------|-------| | Item Weight | 10.4 ounces | | Item Dimensions D x W x H | 2.25"D x 5.59"W x 5.69"H | | Sensor Type | Ionization | | Alarm | Audible | | Power Source | Battery Powered | | Material Type | Plastic | | Color | WHITE | | Style Name | 10-year limited warranty | | UPC | 000665889651 696720180278 099461840898 029054856425 029054513069 | | Customer Reviews | 4.7 out of 5 stars | | ASIN | B000HEC4EO | | Best Sellers Rank | #793 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #4 in Smoke & Carbon Monoxide Alarms | | Global Trade Identification Number | 00029054856425, 00029054513069 | | Manufacturer | BRK Brands | | Brand Name | FIRST ALERT | | Model Number | SC9120B | | Brand | FIRST ALERT | | Style | 10-year limited warranty | | Power Source | Battery Powered | | Color | WHITE | ## About This Product Features a dual ionization smoke sensing chamber and an electrochemical carbon monoxide sensor, an 85dB horn and a “silence” feature. “Intelligent Sensing Technology” system is designed to reduce nuisance alarms. “Latching Alarm Indication” remembers which unit initiated an alarm. When interconnected in a series, the unit that triggered the alarm rapidly flashes its red LED indicator. After the alarm condition subsides, the initiating unit will store in memory or “latch” the information and begin to flash the LED indicator 2 seconds on, 2 seconds off. The “Perfect Mount” system features a gasketless base and a mounting bracket that keeps the alarm secure over a wide rotation range to allow for true alignment. Other Contractor Preferred features include a dust cover to keep alarm clean during construction, keyhole slots in the mounting bracket eliminate the need to remove the electrical box screws for installation. Two locking features are provided to prevent battery theft and/or theft ... ## Last Seen Prices | Retailer | Price | Availability | Last seen | |----------|-------|-------------|-----------| | [D3 Surplus Outlet](https://shopsavvy.com/api/redirect/products/cq0Yo0WBmWMTfgQD3Mcn/offers/e3cadf92-9378-38b1-1a1a-f4c7e3b635b5?source=shopsavvy&medium=product-page) | $11.37 | In Stock | 2024-08-18 (may have changed) | | [theversaces](https://shopsavvy.com/api/redirect/products/cq0Yo0WBmWMTfgQD3Mcn/offers/2XXnyxZumu5rDGXch3o5?source=shopsavvy&medium=product-page) | $29.25 | In Stock | 2023-07-04 (may have changed) | | [1000Bulbs](https://shopsavvy.com/api/redirect/products/cq0Yo0WBmWMTfgQD3Mcn/offers/4D9SEMDgjDBWizKiU3fI?source=shopsavvy&medium=product-page) | $31.45 | In Stock | 2023-10-29 (may have changed) | | [Amazon](https://shopsavvy.com/api/redirect/products/cq0Yo0WBmWMTfgQD3Mcn/offers/57ca853d-a946-3452-5779-c74599f3c845?source=shopsavvy&medium=product-page) | $33.19 | In Stock | 2023-10-29 (may have changed) | | [Southern California Electric](https://shopsavvy.com/api/redirect/products/cq0Yo0WBmWMTfgQD3Mcn/offers/S1dWMazwHRnJxo38bvFY?source=shopsavvy&medium=product-page) | $34.00 | In Stock | 2023-01-31 (may have changed) | | [Bonanza](https://shopsavvy.com/api/redirect/products/cq0Yo0WBmWMTfgQD3Mcn/offers/c3892a07-70d8-2b32-9af8-ba3e298e0312?source=shopsavvy&medium=product-page) | $34.64 | In Stock | 2023-10-29 (may have changed) | | [Sonic Electric](https://shopsavvy.com/api/redirect/products/cq0Yo0WBmWMTfgQD3Mcn/offers/iclAwMLpqTOyQ8jdKKid?source=shopsavvy&medium=product-page) | $35.00 | In Stock | 2023-10-29 (may have changed) | | [Mercari](https://shopsavvy.com/api/redirect/products/cq0Yo0WBmWMTfgQD3Mcn/offers/jPuIugeBCnqmItkvgaav?source=shopsavvy&medium=product-page) | $36.00 | In Stock | 2024-09-27 (may have changed) | | [Diglo](https://shopsavvy.com/api/redirect/products/cq0Yo0WBmWMTfgQD3Mcn/offers/KpQeVVLraOz5E2Gv58fl?source=shopsavvy&medium=product-page) | $36.37 | In Stock | 2024-04-10 (may have changed) | | [SuppliesDepot.com](https://shopsavvy.com/api/redirect/products/cq0Yo0WBmWMTfgQD3Mcn/offers/oyy2dNDkVvvPlhovNdqs?source=shopsavvy&medium=product-page) | $36.96 | In Stock | 2022-07-04 (may have changed) | | [Crawford Electric Supply](https://shopsavvy.com/api/redirect/products/cq0Yo0WBmWMTfgQD3Mcn/offers/ecSkjDWnTrA5SWbRvLcL?source=shopsavvy&medium=product-page) | $38.69 | In Stock | 2023-10-29 (may have changed) | | [Zoro Tools Industrial Supplies](https://shopsavvy.com/api/redirect/products/cq0Yo0WBmWMTfgQD3Mcn/offers/W8kq8U86T29tJAyKnyuD?source=shopsavvy&medium=product-page) | $39.25 | In Stock | 2022-08-15 (may have changed) | | [MrSupply.com](https://shopsavvy.com/api/redirect/products/cq0Yo0WBmWMTfgQD3Mcn/offers/gewIWfUObGPbIcUl3Pgu?source=shopsavvy&medium=product-page) | $39.35 | In Stock | 2024-09-27 (may have changed) | | [Energy Avenue](https://shopsavvy.com/api/redirect/products/cq0Yo0WBmWMTfgQD3Mcn/offers/dKRPVNrWdNR2D35MDyYp?source=shopsavvy&medium=product-page) | $39.84 | In Stock | 2024-09-27 (may have changed) | | [Sunco Lighting](https://shopsavvy.com/api/redirect/products/cq0Yo0WBmWMTfgQD3Mcn/offers/4Ga7RUHOmV7IT9ZYiDhU?source=shopsavvy&medium=product-page) | $39.99 | In Stock | 2024-04-10 (may have changed) | | [CPEsupply.com](https://shopsavvy.com/api/redirect/products/cq0Yo0WBmWMTfgQD3Mcn/offers/hOKUA2j8k3s40lzsdBzL?source=shopsavvy&medium=product-page) | $40.37 | In Stock | 2024-04-10 (may have changed) | | [Conservation Mart](https://shopsavvy.com/api/redirect/products/cq0Yo0WBmWMTfgQD3Mcn/offers/eIcJR6GKb32H5u86Lhct?source=shopsavvy&medium=product-page) | $40.50 | In Stock | 2023-07-04 (may have changed) | | [The Wires Zone](https://shopsavvy.com/api/redirect/products/cq0Yo0WBmWMTfgQD3Mcn/offers/PMPJaVuYO9crhcvE53CS?source=shopsavvy&medium=product-page) | $41.20 | In Stock | 2024-04-10 (may have changed) | | [Dale Electric Supply Co.](https://shopsavvy.com/api/redirect/products/cq0Yo0WBmWMTfgQD3Mcn/offers/3xgOv2C6vIF2rCPwpsnD?source=shopsavvy&medium=product-page) | $41.51 | In Stock | 2022-08-15 (may have changed) | | [Electrical Marketplace](https://shopsavvy.com/api/redirect/products/cq0Yo0WBmWMTfgQD3Mcn/offers/f1y5NWxehuddGMPoLF5T?source=shopsavvy&medium=product-page) | $41.72 | In Stock | 2024-04-10 (may have changed) | [See every retailer and the full price history on ShopSavvy](https://shopsavvy.com/products/first-alert-smoke-and-carbon-monoxide-alarm-with-battery-backup) --- *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. 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