[Multi-Function Air Quality Monitor] This is a indoor air quality monitor that accurately detects carbon dioxide (CO2), formaldehyde (HCHO), volatile organic compounds (TVOC),in real time. It helps you stay informed about the air quality in your living environment at a glance. [Smart LED Color Screen] Air quality tester equipped with a high-definition color screen for real-time data display, making it clear and easy to read. It provides an overall assessment of environmental quality and tracks the average value of each gas, helping you quickly identify unsafe gases in the air. In alarm mode, the screen changes color to remind you to pay attention to the environment. [High Accuracy and Reliability] Home air quality test built with high-performance chips and advanced infrared (NDIR) sensor technology for CO2 detection, as well as electrochemical sensors for HCHO and TVOC. It is more sensitive, accurate, and stable compared to ordinary sensors. Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Color: Black Material: ABS Package Contents: 1 x air Quality Tester 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.