AD1 Air Quality Multi-Functional Detector
. This device appears to be a multifunctional 6-in-1 indoor air quality monitor and carbon dioxide (CO₂) tester.
. Material : ABS
. Lithium Battery : 1 x 5V / 1200mAh
. Display : LCD Display With Backlight
. Range PM2.5 : 0 - 500 ug/m³ (Fine particulate matter)
. Range HCHO : 0 - 2 ug/m³ (Formaldehyde)
. Range TVOC : 0 - 6 ug/m³ (Total Volatile Organic Compounds)
. Range CO₂ : 400 - 5000 ppm (Carbon dioxide)
. Temperature Range : 0 - 50°C
. Humidity Range : 0 - 100%  RH
. Self calibration with alam function
. High accuracy semiconductor sensors