$50 - $100
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NICGOL 5-in-1 Natural Gas & CO Detector Plug-in with Battery Backup (2-Pack)
Plug-in gas and CO detector with battery backup for uninterrupted safety.
Vilfet 5-in-1 Carbon Monoxide & Natural Gas Detector with Digital Display
A 5-in-1 digital display for clear, comprehensive gas detection and peace of mind.
briidea Bluetooth RV Carbon Monoxide & Propane Detector with App Control
App-controlled RV safety detector for remote propane and CO monitoring.
$100 - $200
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Airthings 2950 Wave Radon Detector with Humidity & Temperature Sensor
Smart radon detector with continuous monitoring and humidity/temperature tracking.