[9-in-1 Multifunctional Air Quality Monitor] The upgraded indoor air quality monitor can accurately evaluate a variety of air quality indicators, including formaldehyde (HCHO), PM2.5, PM1.0, PM10, HCHO, TVOC, temperature, Humidity, date time. It is very necessary to know the air quality where you live [Portable Air Detector] Spot-check the indoor air quality anywhere or turn on the device for continuous monitoring. This easy-to-carry air quality detector can help monitor the kitchen, bedroom, office, school , cars, hotels, travel, camping, etc., especially places with babies, children and pregnant women. [Easy to operate] This air monitor is easy to operate by just pressing the function button, and the updated user manual is very simple and easy to understand. The smart air detector can monitor the environmental conditions you care about over a period of time. You can take it with you to monitor air quality anywhere. At the same time, the formaldehyde standard value can be set. If the concentration is higher than the standard value, the device will alarm. Input voltage: 5.0V/1000mA Charging temperature: -10-45 Formaldehyde test object range: 0-1.999mg/m3 Test: Semiconductor sensor Sample type: Diffusion Concentration unit: mg/m3 Test range: 0.000-9.999mg/m3 Test: Semiconductor sensor Sample type: Diffusion Concentration unit: mg/m3 Test time: 5 minutes PM2.5/PM1.0/PM10 test Total number of test particles: 2.5um, 1.0um, 10um Test particle quality: PM2.5, PM10 Sampling time: 3 seconds Test: Concentration (per liter) Test range: 0-999ug/m3 Operating environment air pressure: 86Kpa-106Kpa Relative humidity: 20%-85% Test temperature: -10-45 Storage temperature: -20- 50 Material: Plastic Color: Black Packaging Contents: 1 * The air quality monitor only has the above packaging content, other products are not included. Note: Lighting and different monitors may cause the color of the item in the picture to be slightly different from the actual item. The measurement allowance is +/-1-3cm.