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. 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. 3. User-Friendly Formaldehyde Tester: Designed for convenience, this formaldehyde tester requires no calibration. Simply turn it on to start measuring CO2, HCHO, TVOC, temperature, and humidity instantly, making it easy for anyone to use. 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. 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. Color: White Material: ABS Package Contents: 1 x CO2 detector 1 x bracket 1 x charging cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.