For example, the lawsuit alleges that Amazon sold 24,000 faulty carbon monoxide detectors made by apparently Chinese companies, including one named WJZXTEK. After being alerted by CPSC staffers that the detectors did not work, Amazon stopped selling them, the lawsuit said. Amazon then contacted consumers with a refund offer. But the company declined to work with the CPSC on a safety recall. “Amazon’s unilateral actions are insufficient to remediate the hazards,” the lawsuit said.