With its userfriendly interface, hold the on/off button for three seconds to activate automatic CO2 detection. This makes it an essential tool for any modern household. Easy activation and operation Simply press and hold the on/off button for three seconds to enable automatic CO2 detection. Designed for reliable, everyday use without complex setup. Ideal for indoor air awareness For families who prioritize maintaining indoor air in homes or offices. Helps you monitor air quality to support healthier living and working environments. Flexible placement and portability Suitable for kitchens, living rooms, bedrooms, or on the go. Keeps you constantly aware of your environment's air, wherever you are. Clear display and dependable power Compact device with a colorful backlit display that visually indicates CO2 concentration changes. Powered by a builtin 1200mAh battery rechargeable via USB. Practical use scenarios In the kitchen during cooking to gauge ventilation needs and CO2 buildup. In living rooms or bedrooms for ongoing air quality awareness and comfort. In offices or while traveling to monitor CO2 levels wherever you are.