Features: Accurately monitor indoor air quality with this high precisions CO2 detector feature 1.5s sampling, realtime temperature/humidity display (400-5000ppm CO2 ranges), and visual/audibles alerts for unhealthy air level. Portable ABS device with foldable stand, integrated 800mAh rechargeable battery (24hr runtimes), and USB charging for continuous air quality monitoring anywhere. Ideal for family, office workers monitoring workspaces conditions, and frequent travel needing small environmental tracking in car/hotel. Essential for optimizing ventilation in homes offices, classrooms, vehicles, or travel accommodations through reliable CO2 concentration measurements. Maintain measurement accuracy over time with manual calibration function while benefiting from quiet operations mode during critical meetings or sleep hours. Specifications: Material: ABS Size: 96x33mm/3.78x1.3in Color: White Display Method: LED Screen Measuring Item: CO2, Temperature, Humidity CO2 Measuring Ranges: 400-5000ppm Sampling Time: 1.5 second Temperature Ranges: -10-50/14-122 Humidity Ranges: 20%-85% Power Supply: 800mAh rechargeable battery Carbon dioxide exceeds standard alarm value: Defaults 1000ppm Package Includes: 1pc Digital CO2 Meter 1pc USB Data Cable 1pc User Manual note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual coloring of the item.