1. Detection: Our smart carbon dioxide value tester gases analyzer is made of precise NDIR sensors, which can accurately monitor CO2 concentration, PM1.0, PM2.5, TVOC, ambient humidity, and temperature values in real-time.2. LCD Display: This carbon dioxide detection instrument has an intelligent color screen display with clear numbers, which are very easy to identify and read. In the alarm mode, the color can be changed to remind the user to pay attention to the environment.3. Special Design: The design of this carbon dioxide detection instrument is very special. When the CO2 concentration exceeds the value of 1500PPM, an alarm will be issued to you to keep the indoor environment ventilated in time. You can also manually design the carbon dioxide alarm value.4. Widely Used: The quality of this carbon dioxide detection instrument is very good and the scope of application is very wide. It is very suitable for office, bedroom, living room, classroom, laboratory, gym, and other occasions.The quality of our smart quality monitors is very good, allowing you to better understand the indoor conditions and make adjustments in time to protect your health and safety.Together we can intelligently control the ventilation system, and at the same time can connect to WIFI to view the recorded data on the mobile phone.In alert mode, alert the user to the environment by changing the color.Specification:Product Name: Smart Quality MonitorTemperature measurement range: -20C~60C; +/- 2CHumidity measurement range: 5%~95%RH; +/- 5%RHCO2 measurement range: 400-5000ppm, resolution: 1ppmCO2 measurement accuracy: +/- 50ppm or +/- 5% of readingTVOC measurement range: 0~20mg/m3PM1.0 measuring range: 0~500g/m3PM2.5 measurement range: 0~500g/m3Working temperature: 0-50CWorking humidity: 0-95% (non-condensing)Input voltage: DC 12V/2ASingle output wiring: RS485/relay for CO2, TVOC, PM1.0, PM2.5, and humidity signal outputPlug Type: Plug,it applies to Canada, India,Mexico, Thailand, the United States, the Philippines,Taiwan and so on.Colour: WhiteMaterial: ABSSize: 18 x 12 x 4cmPackage Contents:1 x Carbon dioxide detection instrument1 x English manualOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.