The thumbnail may be misleading, see this page for affected products:

https://recalls-rappels.canada.ca/en/alert-recall/health-canada-warns-various-radon-gas-detectors-sold-amazonca-may-pose-health-and

Consumers who have these affected products should immediately stop using them and dispose of them in accordance with municipal electronic waste requirements.

Consumers should only purchase electronic radon monitors that have passed performance testing by the Canadian National Radon Proficiency Program (C-NRPP), the Canadian radon certification program recognized by Health Canada. Health Canada provides guidance for measuring radon in homes: Guide for radon measurements in homes - Canada.ca.

To learn about ways to measure the radon gas level in their home with an approved radon detector and how to reduce the radon level if it is high, consumers should visit the following website: Take Action on radon.