This product is a multifunctional air detector that detects Formaldehyde (HCHO), Total Volatile Organic Compound (TVOC) and Particulate matter <2.5 micro-sized particles (PM2.5) with clock and air quality record chart
 
. 2.8'' color liquid crystal display (LCD)
. User adjustable HCHO alarm threshold alert of hazardous conditions
. 2200 mAh capacity lithium battery
. 5v 1000mA Micro USB charging
. Low battery warning