Combination Natural Gas Detector & Carbon Monoxide Detector, 4-in-1 Carbon Monoxide Alarm,Fahrenheit(°F) & Humidity,Propane,Methane,Gas Detector Alarm & CO Detector for Home,RV,Apartment Concession Essentials Part Number: 4821

Part Number: 4821

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Part Number: 4325286439

Combination Natural Gas Detector & Carbon Monoxide Detector, 4-in-1 Carbon Monoxide Alarm,Fahrenheit(°F) & Humidity,Propane,Methane,Gas Detector Alarm & CO Detector for Home,RV,Apartment Concession Essentials Part Number: 4821Brand: Hembisen Features: Upgrade Plug in Combination Gas & Carbon Monoxide Detector Plug and play, easy to install, 4 in 1 sensor, real time monitoring display and alarm. Combination Gas & Carbon Monoxide Sensor Adopting catalytic combustion sensor and electrochemical sensor, real time monitoring and displaying the concentration of combustible gas and carbon monoxide, with sharper and more accurate sense of smell. TemperatureF and Humidity SensorReal