Fangrui Product Details [comprehensive Air Quality Test]: This 6-in-1 Air Quality Tester Integrates Multiple Test Functions For Measuring Co2/tvoc/hcho/pm2.5/ Co/pm10 [tft Color Display App Control]: 2.8-inch Tft Color Screen, You Can See The Test Data Clearly At A Glance. With The Tuya App, Enjoy Real-time Testing And Remote Management Of Your Homes Air Quality From Anywhere You Are. [personalized Settings Historical Data Checking]: Supporting Customizes Alarm Limits, Sets Sleep Modes, And Effortlessly Explores Detailed Historical Data On Air Parameters By Day, Month, Or Year. The App Also Boasts A User-friendly Interface With Options For Temperature Unit Switching And Versatile Timer Settings, Ensuring A Personalized And Convenient Experience Tailored To Your Needs. Co2 Detector: Smart Co2 Value Tester Gas Analyzer Uses Semiconductor Tvoc Sensor. It Is A High-quality Air Quality Detector, Using High-quality Electrochemical Detection Module, Good Accuracy, Stable Performance, Strong Anti-interference Ability, Low Consumption