Introducing the Portable Mini CO2 Detector-a compact, versatile 3-in-1 monitor for precise air quality, temperature, and humidity analysis. Detect real-time CO2 concentrations (400-5000PPM), indoor/outdoor humidity (0-99%RH), and temperature (0-50) with accuracy. Small and portable, this monitor is easily carried anywhere as a functional decoration. Its intelligent early warning system and high-quality infrared NDIR sensor ensure accurate readings and prevent interference. Equipped with a large rechargeable battery, it charges in 2.5-hours for up to 30-hours of standby. Use it on-the-go or for continuous monitoring in specific locations. The full-color LCD screen provides easy-to-read data, featuring an intelligent backlight and eye protection function. Its 1-key operation simplifies usage. This multi-functional detector finds utility in diverse settings: home, school, office, travel, indoors/outdoors, agriculture, and warehouses. Stay informed about air quality effortlessly with this reliable, portable CO2 detector.