The 8-in-1 air quality monitor has 5 built-in professional detection sensors, which can accurately detect the current indoor carbon dioxide, PM2.5, HCHO, PM1.0, TVOC, PM10, temperature and humidity. Gas concentration is divided into 3 levels - Green(Safe), Orange(), Red(Unhealthy). When the gas concentration exceeds the set value (alarm value: orange), an alarm will be issued to remind people. Standalone CO2 NDIR sensor is more accurate and anti-interference than semiconductor sensor. Can accurately measure the carbon dioxide concentration in the air. [Advanced Laser Particle Sensor]Standalone PM2.5 particle sensor is more accurate than infrared sensor. A built-in fan increases gas flow, increasing detection range and sensitivity. You can monitor the gas concentration in your home through the mobile app at any time, turn off the screen in time, and the data can also be transmitted to the app via WiFi. This air monitor is powered by the included Type-C charging cable, it can work for 2 hours after fully , so please keep it connected to the power source during daily use. air detector contains the following functions: Carbon dioxide detection, PM2.5 detection, HCHO detection, PM1.0 detection, TVOC detection, PM10 detection, temperature detection and humidity detection Simultaneous use of self-developed NDIR sensor and laser particle sensor. Standalone CO2 NDIR sensors are more accurate and immune to interference than semiconductor sensors. Separate PM2.5 particle sensor is more accurate than infrared sensor. A built-in fan increases gas flow and increases detection range and sensitivity. The gas concentration is displayed separately, divided into 3 levels according to the gas concentration. Green - Safe, Orange - Poor, Red - Unhealthy Follow the cloud link anytime. Product parameters Appropriate temperature: 0 ~ 50 HCHO measuring range: 0 ~ 1.999mg/m VOC measurement range: 0 ~ 9.999mg/m Temperature measurement range: 0 ~ 50C Carbon dioxide measurement range: 400 ~ 5000PPM Humidity measurement range: 0 ~ 99% RH PM1.0/2.5/10 Measuring range: 0 ~ 1000g/m humidity Kind tips: Since this product is an 8-in-1 air detection, we strongly recommend using the power cord to connect all the way, otherwise the power will be completely . Colour:black Material:ABS Package Contents: 1 x Air Quality Monitor Only the above package content, other products are not included. Note: Light reflection 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.