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As formaldehyde and airborne particles become more and more harmful to human health, are you increasingly concerned about the air quality around you? Our air quality monitor is especially designed to gives you a comprehensive understanding of the air quality around you, including HCHO, TVOC, pm1.0, pm2.5, pm10, temperature and humidity. Features: More accurate testing result, Real time record, displaying the data in the form of charts Lightweight and portable, ideal for bedroom, living room, office, hotel, car and traveling use Equipped with a high-capacity lithium battery, quick charge and long standby time Built in a turbine, making testing more quickly and stably 4 high-precision sensors and ARM processor computing chips Built in 1500mAh capacity lithium battery with long stand by time With usb cable, easier charging Do calibration well on initial use, otherwise, data may be inaccurate. Warm Tips: a. Please read the user manual before use. b. Please keep it away from chemical substances, such as alcohol, perfume, gas, smoke when working. c. Please do calibration before testing, and read the testing results after 5 minutes detection. d. It is highly advised to detect air quality from low density environment to high density environment. Specifications: Material : ABS Overall Dimension: 2.5"(L) X 1.5"(W) X 6"(H) Net Weight: 0.5 lbs Input: 5.0V/1A Battery Capacity: 1000mAh Lithium Battery Cord Length: 32" HCHO Test Range : 0.000~1.999 mg/m3 TVOC Test Range: 0.000~9.999 mg/m3 PM1.0/PM2.5/PM10 Range: 0~999μg/ m3 Temperature Test Range: 0~50℃ Humidity Test Range: 20~90%RH Working Environment: 5~45℃,