Features The appearance is stylish and exquisite, with a metal body, rounded lines, noble and elegant. Easy to operate with onetouch of a touch button. The digital screen displays the working status at a glance. Choose high-quality sensors, accurate,high-efficiency and energy-saving. It is suitable for scenes such as placing it on the desktop or hanging on the wall.1:Temperature and humidity display: use high-precision temperature and humidity sensor detection, real-time display of values;temperature display 0---40 C (32---99 F), humidity display 20%---95% (tolerance +/-5 %);2:CO2 concentration display: Use a high-precision carbon dioxide sensor to detect and display the CO2 concentration value in realtime; the display concentration value range is 400---6000ppm;3:TVOC concentration display: Use a high-precision TVOC sensor to detect and display the value in real time; the TVOCconcentration value display range is 0---2 mg/m;4:HCHO concentration display : use high-precision HCHO sensor to detect and display the value in real time; the HCHO concentrationvalue display range is 0---1 mg/m 3;5:CO2 concentration level display and alarm prompt: according to the value detected by the CO2 sensor, different colors are usedto display the concentration level, allowing consumers to experience intuitively; the specific correspondence is as follows: 400to 800 ppm-green display-excellent, 801 to 1200 ppm-yellow display -Generally, 1201 to 2000ppm-orange display-poor, 2001 to 6000ppm-red display-severely exceeded; when the CO2 concentration value is higher than 800ppm, the product will continuously"drip-drip" alarm display to remind consumers that the CO2 concentration has started Exceeding standard; the alarm can be turnedon or off according to the needs of consumption.