Amazon.com: Defender Carbon Monoxide Detector. $35 to $45. $45 to $70. $70 & above. Get It Fast. Get It Today. Get It by Tomorrow. Amazon.com Defender Low Level CO Monitor | Reliable CO Detection
: Features listings for various Defender models from third-party sellers. Popular Models & Features Defender Carbon Monoxide Detector - Amazon.com
: Specializes in these units, providing both standard UL-rated residential alarms and low-level monitors.