[9 in 1 MULTIFUNCTIONAL AIR QUALITY MONITOR] This newly upgraded indoor air quality monitor accurately assesses various air quality metrics including levels of formaldehyde (HCHO), PM2.5, PM1.0, PM10, HCHO, TVOC, temperature, humidity, and Date/Time. Understanding the air quality of your living space is essential. [PORTABLE AIR DETECTOR] Check indoor air quality anywhere or leave the device on for continuous monitoring. This lightweight air quality detector is excellent for monitoring air in kitchens, bedrooms, offices, schools, cars, hotels, during travel, and camping, especially in environments with babies, children, and pregnant women. [EASY OPERATION] Operating this air monitor is simple with just a press of the functional button. The updated user manual is straightforward and user-friendly. This intelligent air tester can monitor the environment over a designated period. It can be taken anywhere for air quality assessments. Additionally, you can set a standard value for formaldehyde; if the density exceeds this value, the device will alert you. Input voltage: 5.0V/1000mA Charging temperature: -10 to 45��C Formaldehyde test range: 0-1.999mg/m3 Test method: semiconductor sensor Sample type: diffusion type Concentration unit: mg/m3 Test range: 0.000-9.999mg/m3 Test duration: 5 min for PM2.5/PM1.0/PM10 tests Test particle sizes: 2.5��m, 1.0��m, 10��m Test particle mass: PM2.5, PM10 Sample duration: 3 sec Test concentration (per liter) Test range: 0-999��g/m3 Operating environment air pressure: 86Kpa-106Kpa Relative humidity: 20%-85% Test temperature: -10 to 45��C Storage temperature: -20 to 50��C Material: plastic Color: Black Package Contents: 1 * Air Quality Monitor Only the above package content; other items are not included. Note: Lighting and different displays may cause the item color in the picture to vary slightly from the actual product. Measurement errors of +/- 1-3cm are permitted.