CO2 TVOC Temperature Humidity Air Quality Detector Without battery

Features:
Multiple function, real-time test the concentration of CO2, tvoc value, temperature and humidity.
Selected quality sensor, high precision, anti-interference, with fast reaction speed.
Equipped with large digital display with backlight, you can see the remaining electric amount, CO2 value, TVOC value, temperature and humidity data clearly.
The color circle will change (green-orange-red), according to the co2 and tvoc data.
Applicable for agricultural planting, greenhouse vegetables, production warehouse, material processing, domestic interior, etc.