Tilswall Air Quality Monitor, Detect PM2.5/PM10/PM1.0 Micron Dust

2.8" color liquid crystal display (LCD), 320x240 pixels User adjustable alarm threshold for formaldehyde (HCHO) to alert user of elevated levels Test variables: PM2.5/1.0/10, formaldehyde, TVOC, temperature, humidity Large 1000mAh capacity Lithium battery ,On-board fan to draw in ambient air for more accurate real-time results 5V Micro USB charging,Low battery warning