- Advanced Alarm System: This carbon dioxide detector features three distinct alarm levels to keep you informed. It alerts you when CO2 levels are normal (400-700ppm), elevated (700-1500ppm), or dangerous (1500-5000ppm), ensuring you are always aware of your environment's air quality. - High-Quality Sensor: Equipped with a premium internal sensor, this detector provides precise readings for carbon dioxide concentration, temperature, and humidity. Experience fast and accurate measurements for total peace of mind. - Easy Calibration: Maintain measurement accuracy with our user-friendly calibration function. Simply press the three buttons simultaneously in an open environment to recalibrate the device effortlessly. - USB Charging Convenience: Featuring a built-in 2400mAh lithium battery, this detector supports 5V-1A USB charging for flexible power options. For optimal battery performance, it is advisable to connect to an adapter due to the use of three sensors. Use Scenarios: 1. Home Safety: Ensure the air quality in your home remains safe for your family by monitoring CO2 levels, especially in enclosed spaces such as basements or attics. 2. Office Environment: Maintain a healthy workplace by detecting elevated CO2 levels, promoting better air quality for improved productivity and well-being. 3. Educational Institutions: Utilize this detector in classrooms to safeguard students and staff by monitoring air quality and ensuring a conducive learning environment. This carbon dioxide detector combines advanced technology and user-friendly features to enhance your safety and well-being in any setting.