1.13 in 1: The multifunctional air quality detector monitors in real time the CO2 concentration, TVOC value, HCHO value, PM2.5/PM1.0/PM10 value, temperature and humidity in the air. It also displays time and date and can be used as an alarm clock, timer or stopwatch. 2. App control: Supports connecting TuyaAPP to monitor data in real time, so you can easily view it no matter where you are and it also displays historical data. 3. Clear display with alarm function: 2.8 inch color digital display, clear and easy to read. Fahrenheit display can be switched, with multiple display modes you can adjust to your needs. Supports alarm function; abnormal parameters will sound an alarm to remind you to make adjustments in time. 4. Ventilation design: With multiple ventilation holes that accelerate convection between the air and the detector for effective detection and fast heat dissipation. 5. Portable and practical: Compact size and lightweight, easy to carry, perfect for home, office, school, lar, agricultural planting, etc.