Hello, we received the Honeywell XC 70 instead of H450EN; The problem is that this detector emits a feeble warning sound; barely audible. I think it is serious. I team has long been our dwelling monoxide detectors. I'm replacement phase for devices that have reached their lifetime. But this detector is either faulty or unsuitable dangerously .... It is supposed to give warning to save lives .These sensors will finally become compulsory, but it is appropriate to ensure their reliability
Thank you to amazon for his consistently effective return policy .But see this anomaly with the manufacturer. Cordially
