surrounds you? Our new arrived air quality detector will help you about this. It can detect air quality in your surrounding with accurate indoor/outdoor air quality monitoring system. Useful air quality detector with quick response and high precision. Effectively protect you and your family from the harm of bad air quality. Specifications: Model: D9-B / D9-D / D9-H (Optional) Material: ABS Color: White Measure Medium: PM2.5 , TVOC , HCHO , CO2 Test Function: PM2.5/PM1.0/PM10, 0.3um/0.5um/1.0um/2.5um/5.0um/10um number of particles, TVOC/HCHO/CO2, temperature , humidity. PM2.5 Test Range: 0to6000g/m³ Temperature Test Range: -9to55°C Humidity Test Range: 0to100% TVOC Test Range: 0.000to2.000mg/m³ (D9-B, D9-D, D9-H) HCHO Test Range: 0.000to2.500 mg/m³ (D9-D, D9-H) CO2 Test Range: 400to4000ppm (D9-H) Detection Technique: Semiconductor Sensing Technology Working Temperature: -9°Cto55°C Relative Humidity: less than80%HR Battery: 1 * 3.7V 600mA 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 SettingS: 10 Seconds – 600 Seconds Item Weight: 219g / 7.73oz Item Size: approx. 84 * 60 * 118mm / 3.3 * 2.4 * 4.6in Package Weight: 417g / 14.7oz Package Size: 17.5 * 11.2 * 7cm / 6.9 * 4.4 * 2.8in Package List: 1 * Air Quality Detector 1 * USB Cable 1 * User Manual