[Compact Size & Remote Tuya APP Control]: The compact body design of this CO2 detector, along with its simple and stylish appearance, makes it and easy to carry. Wall-mounted design, built-in multiple sensors for real-time detection and real-time data refresh. The WIFI function supports real-time data viewing on your mobilephone via Tuya or APP. [Multifunctional Design]: This device has a multi-functional design, supporting the detection of the air quality index, formaldehyde, organic pollutants, PM2.5, PM10, carbon monoxide, carbon dioxide, temperature, and humidity, allowing you to know the air quality around you wherever you are. It also features a real-time curve view function, enabling you to see the trend curves of eight groups of parameters: HCHO, TVOC, PM2.5, PM10, carbon monoxide, CO2, temperature, and humidity. [Air Quality Classification & Intelligent Alarm]: This device is designed with a bright 2.8-inch TFT color display to show measurement results and supports switching