... ,remove formaldehyde ,ammonia gas and acetic acid in air which harmful gas and foreign odor.3. nanometer ... 1h,2h,3h ,die rate of nature bacteria in air is 92.21% 94.01% and 95.45 ... convenient for moving, check automatic function ,display air quality in the room automatic. at the same time ... working. 3. Automatic function design, display air quality in the room automatic 4.LED display, working station ...