Air Quality Monitor Indoor Air Pollution Sensor PM2.5 Formaldehyde HCHO Detector OOTDTY Features: 100% brand new and high quality Air quality detector measures PM2.5, HCHO(formaldehyde) and TVOC. Made of high quality plastic, durable and long time use. It's easy to carry the intelligent air quality monitor that can help us detect the gas air pollution in household, kitchen, bedroom, office etc...especially in which has baby,child and pregnant woman. This air monitor is easy to operate with just preing the functional button, easy to read number. An ideal multi-function tester for home & office. Specification: Material: Plastic Size: 168x78mm/ 6.61x3.07 in Package Includes: 1x Air Quality Monitor note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.