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; Color: black, white(optional); CO2 detection ran-ge: 400-5000 PPM; CO2 detection sensitivity: 1PPM; Temperature measurement ran-ge: -10~70; Temperature neasurement accuracy: 1; Humidity measurement ran-ge: 0%~99%RH; Humidity measurement acuracy: 2%RH; Charging mode: DC5V 500mA micro USB interface; Battery: 1 * lithium battery, 1200mAh(not included); Item size: 90 * 70 * 40mm / 3.5 * 2.8 * 1.6in; Package size: 92 * 72 * 42mm / 3.6 * 2.8 * 1.7in; Package weight: 160g / 5.6ounce;