1.Comprehensive Air Quality Monitoring: This 5in1 air quality monitor is a choice for those who value clean air. It can accurately detect carbon dioxide, HCHO (formaldehyde), TVOC (total volatile organic compounds), as well as temperature and humidity in realtime, providing a comprehensive overview of indoor air quality. 2.Definition Display with Alerts: Equipped with a 1.9inch ultra definition LED display, the monitor ensures clear visibility of all monitored data. The carbon dioxide monitor also has a flashing light that changes color according to carbon dioxide concentration, and an audible alarm is triggered when the concentration exceeds 1500 PPM, providing instant alerts for potentially hazardous conditions. 3.Optimized Design for Accurate Readings: The air quality detector's shell has a multimesh design with foursided openings, enhancing air circulation and preventing the device from overheating. This design ensures more accurate measurement data and extends the monitor's service life. 4.UserFriendly Operation: With a simple button, you can easily turn the air quality tester on or off to observe various data. Additionally, builtin 4color LED lights intuitively indicate air quality levels, from healthy to unhealthy, making it easy to understand the current air conditions at a glance.