Can detect CO2, TVOC, temperature and humidityTVOC the abbreviation of "total volatile organic compounds", which means total volatile organic compounds. VOC is defined as any carbonaceous compound that participates in photochemical reactions in the atmosphere except carbon monoxide, carbon dioxide, carbonic acid, metal carbides, carbonates and ammonium carbonate. Features:Multipurpose: it can detect temperature and humidity, CO2, TVOC, you can see the data you care for.It is small in size and easy to carry, and it can be carried anywhere.Function: With intelligent alarm system, ga-s recognition algorithm, multiple anti-interference, air convection technology and greenhouse compensation calibration.Wide ran-ge of practical applications: agricultural planting, greenhouse vegetables, production warehouse, ra-w material processing and so on.Large-screen design, real-time monitoring, clear digital display, and clear test results, fa-st detection and accurate value.The fine-performance chip can accurately capture the weak current generated during the electrochemical reaction and accurately calculate the measurement results.Carbon dioxide detection can be refreshed once per second, can be measured quickly and obtain relatively stable measurement values. Specifications: Material: ABS CO2 detection range: 400-5000 PPMCO2 detection sensitivity: 1PPM Temperature measurement range: -10~70 Temperature neasurement accuracy: 1 Humidity measurement range: 0%~99%RH Humidity measurement acuracy: 2%RH Charging mode: DC5V 500m A micro USB interface Battery: 1 * lithium battery, 1200mAh ( Built-in) Item size: 90 * 70 * 40mm / 3.5 * 2.8 * 1.6in Package size: 92 * 72 * 42mm / 3.6 * 2.8 * 1.7in Packing Includes:1 * Air Quality Detector1 * USB Cable1 * User Manual