This detector can be used to test and display the concentration of PM2.5, temperature and humidity at the same time. And also has WiFi function. Uses Laser particle sensor, optical sensor, with high sensitivity, superior interference resistance ability, stable working performance, with low power consumption. This air quality monitor with a large LCD color display, it can automatically adjust the display brightness according to the surrounding brightness, so that the data is clearly visible and the screen is not harsh. The screen can be automatically turned off to reduce energy consumption after no operation, and the sensor can still transmit data to the cloud through WIFI when the screen is off, and you can view the real-time values through the APP. This product contains a distance sensor, in the dormant state (dormancy after without sensing, you can close this function in the APP) you can approach the product directly or beckon it in front of the product to wake up the screen. It will change the signal color according to the air quality index, and allowing you to more accurately and more graphic know the current air conditions. Hundreds of ventilation holes reserved on the housing not only accelerate the convection between the air and the machine, thereby realizing effective detection, but also provide a fine heat dissipation effect. Applicable temperature: 0 ~ 50 Display mode: LED display PM2.5 measurement range: 0 ~ 1000g/m PM2.5 measurement accuracy: 10g/m (0~100g/m) 10% (100~500g/m) Temperature measurement range: 0 ~ 50 Temperature measurement accuracy: 1 Humidity measurement range: 0 ~ 99%RH Humidity measurement accuracy: 5%RH Colour:black+white Material:ABS Package Contents: 1 x Air Quality Monitor 1 x Type-C charging cable 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.