[Real-Time CO2 Monitoring] Displays current CO2 concentration with flashing light alerts for quick air quality assessment in 1PPM increments. [Semiconductor Detection Technology] Provides accurate 400-5000PPM range readings for agricultural and laboratory environments with stable 1S refresh rate. [Multi-Parameter Measurement] Simultaneously tracks temperature (0-122°F) and humidity (0-99% RH) for comprehensive environmental analysis. [Portable Operation] Built-in 1200mAh battery enables cordless use in greenhouses, warehouses, or labs with 20-minute calibration for reliable data. [User-Friendly Design] Simple one-button operation with ABS housing, ideal for plant growth monitoring and indoor air quality checks., Manufacturer: UPALDHOU