Vilfet 5-in-1 Carbon Monoxide Detectors, Natural Gas Leak Detector, Plug-in & Battery Backup Co Detector, HD Digital Display, CO Gas Temp Humidity Sensor, 2-Pcs, Black

• 5-in-1 Detectors - Real-time monitoring of carbon monoxide(PPM), combustible gas (%LEL), temperature( F), humidity(RH%) and Backup Battery.
• Easy Installation - Plug and play. Need to remove the screen protector.
• 9V battery backup provides protection during a power outage.
• An alarm of 85 decibels (adjustable) will sound.
• Vilfet provides unconditional returns and exchanges within one year.