Air Quality Monitor Indoor Outdoor PM2.5, PM1.0, PM10, CO2 Meter Tester Gas Leak Detector Temperature and Humidity Sensor Helper In order to avoid problems in transit, we set the Lock Mode of the gas detector. When you get the gas detector and use for the first time, Please press the power button for more than 30 seconds to start, and do not move your finger during press. This is only for your first boot. Feature: Multi-function Smart calibration Color screen Medical grade polymer shell, nano-antibacterial ABS material Imported high-precision sensor components, original POS-V particle swarm optimization Automatic baseline correction, intelligent calibration, accurate and stable data Function: Accurate measurement of PM1.0, PM2.5, PM10, CO2, 4 High-precision sensors Independent sensing data collection High-level configuration Numerical accuracy and reliability Particulate: High-precision laser sensor , fast detect PM1.0 / PM2.5 / PM10 particles CO2:NDIR detection technology, automatic baseline calibration, greatly improve data accuracy Formaldehyde:High-precision imported electrochemical sensor, accurate resolution 0.01mg/m3; free formaldehyde molecules Small and Convenient Size: 70*115*32.6mm CortexMO+ level ARM core processor 16-bit high precision AD chip 32-bit High-speed processing performance, data more accurate, system more smoother The 5th generation laser particle sensor More precise and faster Product information: A new era of multi-level particle smart detection 2.8 inch TFT screen:Data high-definition presenting Active air interaction system, mute fan with low noise 3D circular air convection, increases contact area with the sensor, testing more accurate One button, easy to use One-touch operation,Intelligent detection 24-hour history record curveclear air quality changes. Air quality real-time monitoring,24hours taking care of your family Large lithium battery,High-precision power control chip Longer standby time and safer use Parameters and models: Model PM1.0 PM2.