3. User-Friendly Formaldehyde Tester: Designed for convenience, this formaldehyde tester requires no calibration. Simply turn it on to measuring CO2, HCHO, TVOC, temperature, and humidity instantly, making it easy for anyone to use. 2. Comprehensive Room Climate Measurement: The room temperature humidity meter provides real-time readings of temperature and humidity, allowing you to maintain optimal living conditions while monitoring air quality effectively. 4. Intuitive CO2 Detection: The CO2 detector features a large display that shows real-time CO2 concentration levels along with date, time, and battery status. Color-coded alerts indicate air quality: green for safe levels, orange for caution, and red for high levels. Feature: 1. Advanced Air Quality Monitoring: This air quality monitor features a high-quality CO2 HCHO TVOC tester that utilizes semiconductor sensors for precise detection of CO2, formaldehyde, and total volatile organic compounds (TVOCs), ensuring a safe indoor environment. 5. Efficient Airflow Design: With hundreds of ventilation holes, this air quality monitor enhances air circulation for effective detection and provides excellent heat dissipation, ensuring reliable performance and in any environment., Manufacturer: Akfldms