Features: 1. Know Your Air Clearly: For everyone,It's neceary to know the air quality of the place where you live.This air monitors have LCD Digital Color Screen, large and easy to read. 2. Easy Operate: This air monitors is easy to operate which just preing the functional button and one full page design make everyone can easy to read all the real time readings at the same time. It's easy to carry the intelligent air quality monitors 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. 3. Rechargeable Battery: Air Quality Detector has rechargeable lithium battery. Built-in low power consumption proceing chip, can carry on long time uninterrupted monitoring to air quality. It will always take care of you and your family health. Air quality monitors built in darts 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. Specifications: Material: plastic Color: white, black(optional) Size: 70*90*35 mm Carbon dioxide measurement range: 400 ~ 5000 PPM Battery: 1200MAH Package Included: 1 x Air Quality Monitor(with battery) Notes: 1. Please allow 0-1 inch error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from real object.