A desktop/wall-mount indoor air quality meter built around a 7-inch color touchscreen and an NDIR CO2 sensor reading 0-9999 ppm with under-2-second response, alongside temperature (0-50C) and humidity (0-100% RH) monitoring. Stores logged readings to 16GB of internal memory in CSV format at user-set intervals from 1 second up to 24 hours, with programmable high/low alarms and real-time clock stamping. Runs on a 3000mAh rechargeable battery (about 2 hours on battery, 9 hours to recharge) and includes both a built-in desk stand and a wall-mounting bracket for fixed installation.