General description The Portable Carbon Monoxide Detector with LCD Display and Test Button is an essential safety device designed to detect carbon monoxide levels continuously, ensuring your comfort and security. This EN 50291 certified CO alarm features a replaceable battery and comes in a convenient 2-pack. Technical specifications Alarm sound level: >86dB Battery type: 3x1.5V AA (batteries included) Detection levels: 50-100PPM, 100-300PPM, >300PPM Alarm response times: 50s for >300PPM, 30 minutes for 100-300PPM, 80 minutes for 50-100PPM Usage This carbon monoxide detector is suitable for various locations where carbon monoxide may be present, including kitchens, bathrooms, bedrooms, hotels, parking garages, and during barbecues. The LCD screen displays CO concentration levels in PPM, temperature, humidity, and battery status, while three LED indicators show the device's working states: Red for alarm mode, Yellow for fault mode, and Green for normal standby mode. Installation The