Standalone Smoke and Carbon Monoxide Detector with LCD Screen and Test Button, 360° Monitoring, Automatic Verification

2-IN-1 PROTECTION: Equipped with independently operating photoelectric and electrochemical smoke and CO detectors, it instantly alerts you to dangerous levels of smoke or carbon monoxide, while minimizing false alarms. It offers optimal protection against two deadly hazards, all in one device. INTEGRATED 10-YEAR BATTERY: The integrated lithium battery guarantees 10 years of uninterrupted, energy-efficient, and environmentally friendly power. It frees you from the hassle of regular battery replacements and ensures optimal detector performance. ACCURATE, RELIABLE, AND HIGHLY SENSITIVE: This combined smoke and CO detector has been completely redesigned. It ensures that the alarm is triggered by smoke and not interference, thanks to three separate ambient air samples. A 360° ventilation ring ensures complete air detection, with no blind spots. LED INDICATOR: The tri-color LED display clearly informs you of the detector's operating status with its three flashing colors (green: normal operation; red: alert; yellow: possible malfunction), ensuring 24/7 protection and security at home. LARGE LCD SCREEN: It clearly displays the integrated battery level and the real-time concentration of carbon monoxide (in parts per million, ppm) measured in the ambient air, with an update every 10 seconds.