【High Accuracy & Fast Refresh Data】Equipped with a fast-responding and sensitive high-performance chip. Adopt high-precision infrared (NDIR) sensor technology for the CO2, PM2.5,PM10. Electrochemistry sensor for the HCHO and TVOC. The 5 readings refresh ever 1-2 second. Compare with the common sensor, it is more sensitive, accurately and stable. 【100% Quality Assurance】We are very confident in the quality of this portable 9-in-1 air quality monitor, and provide 12 months warranty or refund for it. Please feel free to reach us if you have any questions about your purchase. We will solve your problem within 24 hours. 【Multifunctional & Easy to Read】Since clean air means a lot to every one. PinoTec Indoor air quality monitor offers accurate monitoring of PM2.5,PM10,CO2, HCHO, TVOC, time,temperature and humidity, all displayed on utral-high definition color screen for people easy to identify and read. With its convenient design, you can monitor the environment at any time and it efficiently measures 8 crucial indexes for evaluating air quality. 【Wide Application】A hanging hole is designed on the back of this portable Air Quality Detector so that you can hang it up to the wall for easy viewing. The indoor Air Quality Detector for grow tents is ideal for use in grow rooms, offices, kitchens, schools, kitchens, school cellars, and cars. 【Long Battery Standby】 Xoopon Air Quality Detector built-in 2000mAh battery and packed with USB charging cable. It can be used continuously for about 16 hours after full charging. Do not use it when charging or in lower battery because the data may not so accurate. Built-in low power consumption processing chip, can carry on long time uninterrupted monitoring to air quality. It will always take care of you and your family health. › See more product details