AQ01 air quality detect

Features: 1. HCHO function: range 0.000-0.500mg/m3. 2. TVOC function: range 0.000-9.999mg/m3 3. Real-time Temperature and Humidity function (temperature range: -20~50 degrees, humidity 20%~99%). 4. CO2 function: range 400-5000ppm 5. PM2.5 and PM10 functions:range: 000-999ug/m3 6. Air level function: excellent, good, mild pollution, moderate pollution, severe pollution prompt 7. Backlight function: with automatic semi bright backlight function (the backlight is halved when the battery level is below 25%). 8. Optional with or without alarm function 9. Color TFT screen display 10. USB charging function 11. Easy using