Specifications: Model: D9-B / D9-H (Optional) Material: ABS Color: White Measure Medium: D9-BPM2.5 & TVOC&PM1.0&PM10&temperature & humidity. PM2.5 Test Range: 0~6000g/m3;; Temperature Test Range: -9~55 Humidity Test Range: 0~100% TVOC Test Range: 0.000~2.000mg/m3; (D9-B, D9-H) HCHO Test Range: 0.000~2.500 mg/m3; ( 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 10 - 18 S10 - 600 232g 1 * 1 * USB 1 *