1. High-definition LED screen: The Air Quality Monitor comes with a high-definition LED screen, allowing you to read data faster and more conveniently. The screen displays 4 different color bars representing the CO2 concentration levels, with green indicating healthy levels and red indicating dangerous levels. 2. Accurate CO2 detection: Prior to use, it is recommended to stand the CO2 sensor at the vent for 5-10 minutes for data calibration. The detector is designed to sense variations in air quality within 35 seconds, ensuring accurate and real-time monitoring. 3. Our Air Quality Monitor helps maintain optimal air quality by alerting you to CO2 concentrations over 1000 PPM. 4. Portable and convenient design: With its simple and generous design, this mini Air Quality Monitor is easy to carry around. Its compact size (2.87 x 2.87 x 0.71 inch) and built-in 1000 mAh rechargeable battery provide up to 8 hours of continuous monitoring. 5. Versatile applications: The Air Quality Monitor is suitable for a wide range of environments, including grow rooms, travel, camping, RVs, cars, hotels, parties, wine cellars, kitchens, bedrooms, offices, schools, agricultural planting, and indoor gardens, Manufacturer: ZXZZAS