Description Desktop Air Quality Monitor USB Charging LCD Display Formaldehyde Ozone Carbon Dioxide Measurement PM2.5 HCHO TVOC Gas Detector DM502A-1 Features: MULTIFUNCTIONAL SCIENTIFIC New 2020 upgraded indoor air quality monitor built in DART electrochemical sensors that can This air quality tester accurately aees multiple measures of air quality including concentrations of formaldehyde (HCHO), total natural synthetic volatile organic compounds causing most odors (TVOC), co2, and fine particulate dust matter measuring 2.5 microns in size (PM2.5) , Its very neceary for you to know the air quality of your living place PORTABLE CO2 MONITOR Spot check indoor air quality anywhere or leave device on for continuous monitoring ,This easy-to-carry air detector can help monitor air quality at home, kitchen, bedroom, office, school, car, hotel, travel, campingetc...especially in which has baby,child and pregnant woman. Built with 2000 mAn rechargeable battery and packaged with one USB cable, the standby time can last for 4-6 hours. Information is displayed on a clear color LCD display. EASY OPEARATION This air monitor is easy to operate with just preing the functional button, Updated user manual is very simple and easy to understand. The intelligent air tester can monitor the variety of the environment in a period your care about, You can take it anywhere to monitor air quality. At the same time, you can set a standard value of formaldehyde. When harmful substances exceed the standard, The corresponding area will flash to remind. THOUSAND DIGIT PRECISION,GRADE DIVISION For the formaldehyde (HCHO), volatile organic compounds (TVOC), PM 2.5, PM 10, CO2, 0.001mg / cubic meter thousand accuracy. High performance chip makes digital detection signal amplification and anti-interference software algorithm, data more precise. BUY WITH CONFIDENCE Air quality monitor made of ABS material, good feeling, non-toxic, eco-friendly and durable to use. If you have any problem with the product, let us know. We will do our best to solve the problem for you. Specification: Name: Formaldehyde detector Detection technology: natural air flow detection technology Display mode: LCD liquid crystal color digital display Voltage: 5V Error float: 3% -30% Battery capacity: 1000mAh Warm up after booting: 120 seconds Charging time: about 4 hours Standby time: about 240-360 minutes Size: 148 * 70 * 30mm Color: White Packing included: 1 Air quality tester 1 USB cable 1 User manual DM502-O3 Features: 2.8-inch color liquid crystal display (LCD), 320x240 pixels. User adjustable ozone (O3) alarm threshold to alert the user to increase grade. Test variables: PM2.5/1.0/10, ozone (O3), TVOC, temperature, humidity 1200mAh large capacity lithium battery. Onboard fan draws in ambient air for more accurate real-time results 5V Micro USB charging. Low battery warning. This product is a multi-functional air quality detector that can detect total ozone (O3) volatile organic compounds (TVOC), particulate matter 2.5 microns in size (PM2.5 / 1.0 / 10), temperature and humidity, clock and recording Features. As a scientific air quality detection device, it combines multiple air sensors with built-in sensors. The fan can monitor ozone (O3), total volatile organic compounds (TVOC), PM2.5 / 1.0 / 10, the temperature and humidity on the LCD display. S pecification: Display mode: 2.8-inch LCD screen, 320 x 240 pixels Atmospheric preure: 86Kpa-106Kpa PM detection method: laser scattering Sampling time: 1.5 seconds Product size: 155 x 87 x 35mm Detection temperature: -10C to 50C; 14F to 122F Relative humidity: 20%-85% Storage temperature: -10C to 60C; 14F to 140F TVOC concentration unit: mg /m3 Oxygen concentration unit: ppm Power supply: Lithium battery with a capacity of 1200 mAh; 5V DC power supply for charging Via micro USB port Measuring range: O3 (ozone) PM2.5 PM1.0 PM10 TVOC Temperature Humid P acking list: 1* Air quality tester 1* USB cable 1* Instruction