MEBANE, N.C. (AP) – Nearly 500,000 smoke detectors that might not be able to detect smoke are being recalled by a company based in North Carolina.

The News & Observer reports the company Kidde has issued a recall for models PI2010 and PI9010 due to a manufacturer defect. These models were sold nationwide and online from September 2016 through this January for $20 to $40. Model numbers can be found on the back of the units.

“This poses an immediate and dangerous risk … as properly functioning smoke alarms are a life-saving tool from the dangers of fire-related incidents and smoke inhalation. In 2016, more than 14,000 accidental structure fires were reported to the Florida Fire Incident Reporting System which resulted in 201 civilian fatalities. I advise all fire prevention advocates across our state to immediately spread awareness of this recall,” Florida State Fire Marshal Jimmy Patronis said.

Kidde also recalled 38 million fire extinguishers last year. They had a design flaw that could have prevented them from working and parts of the extinguisher could detach with enough force to pose an impact hazard.

Those with affected smoke alarms can register for replacements by calling 833-551-7739 or visiting this website.