CO2 Carbon Dioxide Meter Humidity Temperature Multipurpose Detection Tool Smart Home Office Indoor Outdoor High Accuracy Air Quality Monitor

High Accuracy: This carbon dioxide meter uses NDIR sensors, which can accurately detect carbon dioxide (CO2) in the air. Easy to Use: Simply press and hold the button for 3 seconds to turn the meter on or off. Even the elderly and children can learn to use it quickly. Facial Expressions: The air quality tester features 4 comfortable facial expressions, allowing you to intuitively understand the air quality you are breathing. Rechargeable Lithium Battery: Built with a 1200mAh rechargeable lithium battery, which can be used continuously for 36-40 hours after a full charge. Wide Application: This smart air quality monitor can help us detect air pollution from gases in homes, kitchens, bedrooms, offices, schools, Cars, hotels, travel, camping, parties, etc.