Multiple Detectable Gases - upgraded indoor air quality monitor built in electrochemical sensors that can accurate detect air of Carbon Monoxide(CO),Carbon Dioxide(CO2), Formaldehyde(HCHO), Volatile Organic Compound(TVOC), Particle Matter(PM2.5/PM10). This new mode can offer real time data and mean value, it is recommend you to focus on mean value of each gas after testing enough time because long-term monitoring, the real-time data exist instability. Know Your Air Clearly - For everyone,It's necessary to know the air quality of the place where you live.This air monitor have LCD Digital Color Screen, and easy to read. This air monitor will offer color indication to show overall environment quality which have Good(Green), Mild Pollution(Yellow),Severe Pollution(Red) three grade. You can directly to know the overall environment quality and track on each gas mean value to know what gas in air is unsafe and take accordingly actions. Easy Operate - This air monitor is easy to operate which just pressing the functional button full page design make everyone can easy to read all the real time readings at the same time. Size about 5.83x2.76x1.18 inch. It's easy to carry the intelligent air quality monitor that can help us detect the air quality in household, kitchen, bedroom, office, school, car, hotel, travel, camping, party etc...especially in which has baby,child and pregnant woman. Kindly Note - Please be aware this air quality monitor is for home indoor place, please kindly close door and window before testing. We do recommend using the monitor as a stationary unit and focus on long time(at least 60 minutes) mean values and overall environment quality indication. Colour:White Material:Plastic Size:148x70x30mm Package Contents: 1 * Host 1 * USB cable 1 * English instruction manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.