【Continuous 24/7 Detection】: The detector provides uninterrupted safety assurance by continuously detecting the concentration of carbon monoxide and smoke in the environment, ensuring immediate alerts when high concentration levels are detected.【High-Stability Sensors】: Utilizes high-accurate electrochemical and photoelectric sensors that offer reliable detection, responsiveness, and reduced false alarms, ensuring accurate and dependable performance.【Energy Saving】: Operated by 3 * 1.5V AA batteries (not included). The alarm sound pattern is 4 beeps every 5seconds for the first 4 minutes. In 4 minutes, it will change to 4 beeps ever minute to save the battery. 【Wide Applications】: It provides continuous detection in various environments, ensuring safety use whether you are at home, in hotels, or on the go. Specifications:Name: Carbon Monoxide DetectorMaterial: ABSPowersupply: 3 * AA battery (not included)Sensor type: Electrochemical sensorCarbon monoxide detection: 000-999PPM Sensitivity & Time: 50ppm, alarms within 60-90 minutes; 100ppm, alarms within 10-40 minutes; 300ppm, alarms within 3 minutesOperation condition: 5℃ to 40℃, 20-90%RHItem size: 107 * 107 * 38mm / 4.21 * 4.21 * 1.50inPackage size: 125 * 118 * 45mm / 4.92 * 4.65 * 1.77inPackage weight: 145g / 5.11ounce Packing List:1 * Carbon Monoxide Detector