Accurately monitor indoor air 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 levels. Portable ABS device with foldable stand, integrated 800mAh rechargeable battery (24hr runtimes), and USB charging for continuous air . Ideal for family, workers 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 great CO2 concentration measurements. Maintain measurement accuracy over time with manual calibration function while benefiting from quiet operations mode during critical meetings or sleep hours., Weight: 0.41005980732 pounds, Manufacturer: MEILVMEIJI