Combination smoke and carbon monoxide alarms sold under the Yfwsrecinoe, JuzhiAnn and JAEHSKA names can stay silent when smoke or fire is present, according to a warning from the Consumer Product Safety Commission. The agency counts about 51,825 of the model JZA-540COM units, sold on Amazon.com and eBay.com from November 2023 through October 2026. No recall exists, because the seller has not answered the agency’s request for one.
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All three brand names cover one product: a white plastic alarm with a digital display, offered singly or in multipacks at prices from about $11 to about $107. The alarms were made in China. The seller of record is Shenzhen Laijinhe Trading Co., Ltd., which operates the Yfwsrecinoe storefront. Anyone who bought a detector from any of the three brands in that window should check the model number printed on the unit. Because all three brands share that one model number, a search of Amazon or eBay order history for JZA-540COM should catch every variant, whichever name appeared on the listing.
Seven reports of alarms that never sounded
CPSC’s warning, numbered 27-052 and dated Oct. 29, 2026, says the agency is aware of seven reports of the alarms failing to alert when smoke or fire was present. The stated hazard is that the units do not sound in hazardous smoke and fire, which the agency says creates a risk of serious injury or death. The notice does not publish laboratory test results, and it does not say whether anyone was hurt in the seven cases, so the public record rests on the incident count and the agency’s own finding.
A combination alarm packs two jobs into one housing, which makes the reported failure more serious than it would be on a single-purpose detector. The notice’s hazard line reads “fails to alarm for smoke and fire.” A household that relies on one of these units as the only alarm on a floor has no second device to catch what the first one missed, and the listing prices, as low as about $11, made it easy to buy several and install them in different rooms.
A warning with no recall behind it
A recall normally arrives with a refund or replacement route. This notice has neither, because the retailer has not responded to CPSC’s request to recall the products. There is no company contact on the page, no free replacement and no return process. The instruction is blunt: stop using the detectors immediately and dispose of them. CPSC also says not to sell or give the alarms away, since a resold unit would carry the same defect into another home.
Consumers who find a JZA-540COM in a hallway or bedroom can report the product, and any failure to sound, through SaferProducts.gov, the federal incident database. CPSC’s consumer hotline is 800-638-2772, with a text line for deaf and hard-of-hearing callers at 800-638-8270. The warning asks that any safety incident be reported there so the agency can add to its count of seven.
Replacing the alarms: placement, testing and standards
The same notice tells households to put working smoke alarms and carbon monoxide detectors on each level of the home and outside separate sleeping areas, and to choose future purchases that meet the UL 2034 and UL 217 safety standards. CPSC’s carbon monoxide alarm guidance adds that smoke alarms belong inside each bedroom, that alarms should be tested monthly, and that batteries should be replaced once a year. It also says CO alarms should stay out of attics and basements unless a sleeping area is there.
Testing matters more than the label on the box. A 2024 CPSC-sponsored survey, the Survey on Use and Functionality of Smoke and Carbon Monoxide Alarms, visited 1,060 households and tested 1,314 alarms. About 9 percent of the tested alarms were nonfunctional even after corrective action, and another 13 percent worked only after a battery fix. One-third of households with smoke alarms never test them, and only 7 percent test monthly. The report, prepared by EurekaFacts for CPSC staff, has not been approved by the Commission.
The survey’s other findings show why a replacement plan matters. About 99 percent of surveyed households had smoke alarms, but only about 55 percent had CO alarms, and only 49 percent had at least one working CO alarm. Around 61 percent of households said they knew nothing at all or only a little about CO alarms. A combination unit that fails quietly would sit inside exactly that gap: the household believes both hazards are covered while neither is.
The stakes of a silent alarm appear in CPSC’s 2022 daylight saving time safety release. It cites National Fire Protection Association data that 57 percent of home fire deaths occurred in homes with no alarms or non-working ones, and that 55 percent of home fire deaths fell between November and March. CPSC’s own count for 2016 through 2018 was about 362,000 unintentional residential fires a year, causing about 2,400 deaths. The release also says to replace any smoke alarm more than 10 years old.
What remains unknown is how many of the 51,825 units are still mounted on ceilings. The seller has not responded, CPSC lists no remedy beyond disposal, no buyer contact and no recall number, and a buyer who never saw the notice has no way to learn the alarm is suspect until someone checks it against the model number.
This article was produced with the assistance of AI and reviewed by Morning Overview editors prior to publication.
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