Feature: 6-IN-1 Multifunctional: 6 IN 1 professional air quality meter features an advanced sensor and recognition algorithm to accurately measure the data of PM2.5, HCHO, CO2, TVOC, temperature and humidity, fast measurement, low error, easily get to know the air quality around you. LCD Display & Alarm Mode: With the large LCD screen display and 24 hours real-time function, clear to read even in dark environment. The color bar would be changed in real time when the detected concentration values are varying, alarming the users through color change. USB Charging: Air Quality Tester has a 1200mAh high capacity rechargeable battery and is packed with a USB rechargeable, you can charge the air quality monitor via power bank, power adapter, computer, PC, laptop. Real-Time Monitor: This air monitor can be refreshed once per second, quickly measuring and obtaining a relatively stable measurement value, offer color indication to show overall environment quality which have Good(Green), Mild Pollution(Yellow), Medium Polluted (Brown), Severe Pollution(Red) four grade. Wide Application: The easy-to-carry smart air quality monitor can help us detect the air quality in homes, kitchens, bedrooms, offices, schools, cars, hotels, travel, camping, parties, etc.... to escort your health. Specification: CO2 Detection Range: 0-5000PPM CO2 Detection Sensitivity: 0-9999ug/m3 TVOC Detection Range: 0-9999ug/m3 PM2.5: 0-999 ug/m3 Temp Measurement Range: 0~70C Temp Measurement Accuracy: 1C Humidity Measurement Range: 0%~99%RH Humidity measurement Accuracy: 2%RH Charging Mode: DC5V Te-C USB interface Battery: built-in lithium battery 1200mAh Size: 90*70*35mm Weight: about 140g Package Includes 1x Air Quality Monitor 1x USB Charging Cable 1x Manual