PM2.5 fine particulate matters( 2.5 micrometers in diameter or smaller) which come from power plants/ industrial processes/ vehicle tailpipes/ wood stoves and even wildfires, it impacts your health and can cause respiratory issues such as allergies/asthma/ COPD/ lung cancer etc. PM2.5 Air Quality Monitor helps you monitor the concentration of PM2.5 fine particulate matter, it also has 6 grades air quality levels indicator(based on current AQI):Good, Moderate, Poor, Unhealthy, Severe and Hazardous, to help you know the air quality and take corresponding measures to reduce the loss. Features: 1)Indoor tempe and humidity 2)PM 2.5/AQI current and max value for 1h/24h/since last reset 4)Temperature units C/F selectable 5)Battery power condition display 6)Rechargeable batteries Specifications: Transmission range (in open air): 20M Frequency: 868MHz Update Rate: 10 minutess Measure rang 1) Indoor temperature measure range: 14 to 140 °F(-9.9 to 60°C). 2) Indoor humidity measure range: 1% ~ 99%. 3) PM 2.5 measure range: 0~999ug/m3 Accuracy:0~100ug/m3 ±10ug/m3 100~500ug/m3 ±10% Resolution: 1ug/m3 Package List: 1x Air Quality Monitor 1x USB TYPE-C Cable
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