Features: Large 4-in-1 Carbon Dioxide Detector: The 4 in 1 CO2 monitor can detect real-time CO2 concentration, together with clear display the current time, humidity and temperature for extremely comfortable and safe life experience. CO2 detection range is featured from 400 to 5000PPM, temperature detection range from 0 to 50 and 0-99%RH for humidity detection range, fits well for agricultural planting, production warehouse, raw material processing, home, school, office, and other occasions. LED Screen Display: Full-color display and 10-inch large screen design ensures its super easy readings with LED digital display for eye protection. It can clearly display the current time, CO2, temperature and humidity. With alarm clock function, three alarm clocks can be set. CO2 Concentration Stage & Alarm: This CO2 detector is functional with 5 stages of CO2 concentration—good stage (400-799 ppm), moderate stage (800-1199 ppm), poor stage (1200-1599 ppm), unhealthy stage (1600-1999 ppm), and very unhealthy stage (2000-5000 ppm). When the CO2 concentration value reaches or exceeds 1500PPM, the product will sound an alarm. Automatic Brightness Adjustment: According to the brightness of the surrounding environment, the screen brightness will be adjusted automatically to make the screen visible and not dazzling. WIFI Connection: Built-in WIFI, the sensor can transmit data to the cloud through WIFI, you can view real-time values at any time in the mobile APP. Remind the family to purify the air. Professional Design: The ventilation holes on all sides not only accelerate the convection between the air and the machine, so as to realize effective detection, but also provide good heat dissipation effect. Wall-mounted design with hook hole is suitable for more scene applications and more practical. Specifications: Plug: US / EU (Optional) Sensors: infrared CO2 sensor, optical sensor. Detection Technology: infrared detection technology Applicable Temperature: 0 ~ 50 Carbon Dioxide Detection range: 400 ~ 5000 ppm Carbon Dioxide Resolution: 1PPM Carbon Dioxide Accuracy: ±(50+5% * reading) PPM Temperature Detection Range: 0 ~ 50 Temperature Detection Accuracy: ±1 Humidity Detection Range: 0 ~ 99% RH Humidity Detection Accuracy: ±5% RH Power Specification: USB Type-C 5V = 3A Temperature Display: Celsius (switchable Fahrenheit) Material: ABS Item Size: 230 * 142 * 35mm / 9.05 * 5.59 * 1.38 inch Item Weight: 450g / 15.87oz Package Size: 270 * 234 * 46mm / 10.63 * 9.21 * 1.81 inch Package Weight: 720g / 25.4oz Package List: 1 * Air Quality Monitor 1 * 2m Type-C Charging Cable 1 * Charger 1 * Positioning Paper 1 * Self-Tapping Screw Set 1 * User Manual (English)