Multiple detectable gas indoor air quality monitors can accurately detect carbon monoxide (CO), carbon dioxide (CO2), formaldehyde (HCHO), and can provide real-time data and average values to clearly understand your air quality. This air monitor With LCD digital color screen, large and easy to read, this smart air quality monitor is easy to carry and can help us detect air quality in bedrooms, offices, baby rooms, cars, hotels, travel, etc. Battery capacity: Built-in battery 1200MA 3.7V Measuring range:HCHO=0-1.712mg/m TVOC=0-12.50mg/m PM25=0-1000ug/m PM10=0-1786ug/m Color: Black Material: Metal+Plastic Package Contents: 1 x Air quality detector 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.