High Sensitivity and Rapid Response: Equipped with an advanced Carbon Monoxide Detector Chip and electrochemical sensor, our CO Gas Monitor Alarm quickly detects odorless, invisible, and deadly carbon monoxide in the air.Respond quickly to protect your life. Easy Installation: Our YTBASE carbon monoxide detector provides continuous monitoring of CO levels, ensuring the safety of your family. No need for wiring, just insert 2 AA batteries (not included) and it's ready to detect, even during power failures. Multiple Alarm Standards: Be alerted at different levels of carbon monoxide concentration. 50ppm sounds an alarm within 60 to 90 minutes, 100ppm sounds an alarm within 10 to 40 minutes, and 300ppm sounds an alarm within 3 minutes. Stay informed and take prompt action.