X-Sense Carbon Monoxide Detector Alarm with Digital LCD Display, CO Detector Alarm with 5-Year Replaceable Battery and Peak Value Memory, XC04-R - Amazon.com
Personal Carbon Monoxide Detector - Portable CO Monitor
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TPI 777 Personal CO Monitor | TEquipment
Lunarlipes Portable Carbon Monoxide Detectors Mini Size, 3-in-1 CO Detector Temp/Humidity Sensor with Lanyard And Kickstand, CO Monitor Alarm Air Quality Monitor 1000mAh Battery, For Home/Travel(Blue) - Amazon.com
Nighthawk Carbon Monoxide Alarm with Digital Display | Kidde