Eightinone air quality detector: This detector can test and display the concentration, temperature and humidity of PM1.0, PM2.5, PM10, CO2, TVOC, HCHO at the same time. And it also has additional functions. precision sensors: It uses a precision NDIR infrared carbon dioxide sensor, a particle sensor, a semiconductor sensor, an optical sensor and a distance sensor, delivering sensitivity, strong antiinterference ability, stable operating performance and low power consumption. LCD color display: Large LCD color display that automatically adjusts brightness according to the surrounding light, making data clearly visible and the image not dazzling. Easy calibration: Two calibration methods are provided. Turn on the device and leave it for 510 minutes, then press the multifunction button three times to perform manual calibration. It also automatically calibrates 24 hours after startup. Parameter setting: Supports setting PM2.5 and CO2 alarm thresholds and alarm sound, temperature unit switching, screenoff function switching and screenoff time setting on the settings page. Key benefits Realtime, simultaneous monitoring of PM1.0, PM2.5, PM10, CO2, TVOC and HCHO, with temperature and humidity display, enabling proactive indoor air quality management. Comprehensive sensor suite provides accurate readings with low interference and reliable performance while keeping power usage low. Clear, readable data on a color display with auto brightness adjustment improves visibility in varying lighting conditions. Simple calibration options keep measurements trustworthy with minimal effort. Flexible settings for alarms, units and screen behavior tailor the device to user preferences. Use scenarios Home environment: monitor air quality in living rooms, bedrooms or nurseries to support health and comfort. Office or classroom: track CO2 and particulate matter to maintain appropriate ventilation and occupant comfort during work or study. Renovation or furnishings: keep an eye on HCHO and VOC levels to manage indoor air quality during updates or when introducing materials.