... hydrogen,30ppm ethanol)<5 minute(for a cigarette)in 20m2 room<10 seconds to reach 63%Warm up time2 hours ... 20ppm (heavy pollution)Backlight brightness Automatically adjust the brightness according to the environmentReal-time displayYear, month, day, week, clockTemperature, ... can be worked together with our wireless controller to control a ventilator, air cleaning device, or humidity device, based on the ...