Description 9-in-1: Multifunctional air quality detector real-time displays time and date and monitors CO2 concentration, HCHO value, TVOC value, PM2.5/PM1.0/PM10 value, temperature and relative humidity in the air. Clear Display: digital screen with backlight, clear and easy to read, support alarm function. Multiple display modes are available, you can switch according to your needs. High Accuracy: Using air semiconductor and infrared sensor, plus high-performance chip, detection is more accurate, higher accuracy, and the accuracy can reach 1PPM. APP Control: Support to connect to the phone APP via BT, you can read up to 1440 sets of data for 60 , compatible with iOS and Android . Quick Heat Dissipation: With multiple ventilation holes, which accelerate the convection between the air and the detector, to achieve effective detection and provide a nice heat dissipation effect. Portable air quality monitor adopts air semiconductor and infrared sensor with stable performance and high detection accuracy. It supports connection to the phone APP via BT, you can view the data within 60 . -screen LCD digital display, real-time monitoring, perfect , office, school, warehouse, agricultural planting, etc. Built-in Battery: Equipped with 2000mAh high-capacity rechargeable battery, low power consumption and long endurance, no need to replace the battery frequently. Wide Application: and portable, it is suitable , office, school, warehouse, agricultural planting, etc. No need to calibrate at startup, automatic monitoring. Colour:Black Material:plastic Package Contents: 1 * Air Quality Monitor 1 * USB Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.