Digital CO2 Air Quality Monitor PM1.0 PM2.5 PM10 HCHO TVOC Detector Temperature Humidity Date Time Gas New Analyzer Meter Sensor      Specifications:          Model: D9-B / D9-H (Optional)      Material: ABS      Color: White      Measure Medium:      D9-B：PM2.5 & TVOC&PM1.0&PM10&temperature & humidity.      PM2.5 Test Range: 0~6000g/m⊃3;;      Temperature Test Range: -9~55℃      Humidity Test Range: 0~100%       TVOC Test Range: 0.000~2.000mg/m⊃3; (D9-B, D9-H)      HCHO Test Range: 0.000~2.500 mg/m⊃3; ( D9-H)      CO2 Test Range: 400~4000ppm (D9-H)      Detection Technique: Semiconductor Sensing Technology      Working Temperature: -9℃~55℃      Relative Humidity: <80%HR      Battery: 1 * 3.7V 3000mA Li-ion Battery (Built-in)      Input: 5V, 1A      Date & Time Setting: Users can set the current date and time      Adjustable Automatic Shutdown Time Setting Range: 10 Minutes - 18 Hours      Adjustable Backlight Brightness Setting: 10% - 100%      Historical Data Settings: Users can view historical data saved by the system      Maximum Storage Management Space: 65,534pcs      Adjustable Timing Storage Settings: 10 Minutes - 18 Hours      Adjustable Timing Screen Switching Setting S: 10 Seconds - 600 Seconds      Item Weight: 232g         Package List:          1 * Air Quality Detector      1 * USB Cable      1 * User Manual