Siterwell 10-Year Lifespan Plug-in Portable CO Detector

Just Plug in to Use: Just unfold the plug and insert device into a 120V outlet. Perfect for Home and Travel: Weigh similar to a smartphone, effortlessly portable with its palm-size design. The device can be placed upright on the table to protect you from carbon monoxide wherever you go— at a hotel, in an RV, or out camping. Intuitive Color Alert:  Easy-to-understand breathing light color: green - "POWER"，yellow - "FAULT"，red - "ALARM". Fast & Accurate CO Detection: advanced electrochemical sensor detects carbon monoxide levels accurately before the danger occurs. Sleep-Friendly Features: Gentle light design and one-touch silence function ensure your sleep won't be disturbed. Build-in Backup Battery: Battery backup provides protection during a power outage or even severe weather conditions. Loud as Car Alarm: Device emits an 85dB alarm (car alarm ≈ 90 DB） loud enough to warn people evacuate in time.