Feature 1Scope Of Application: Indoor air quality monitor is suitable for detecting PM2.5, temperature, humidity, TVOC, carbon dioxide, formaldehyde, multi functional and wide range of application 2WIFI Module: WiFi air quality detector has WIFI module, which can use remote cell phone APP monitoring 3Ventilation Hole Design: Smart air quality monitor has hundreds of ventilation holes in the rear, accelerating the convection between the air and the machine for effective detection, providing a heat dissipation effect 4Convenient and Practical: Smart carbon dioxide value tester uses an empty semiconductor TVOC sensor to detect air quality, temperature, humidity 5ABS Material: Smart air quality monitor is made of ABS material, which is wearable and durable, and can be used with confidenceItem Type: Indoor Air Quality MonitorMaterial: ABSPM2.5 Measurement Range: 0-999ug/m3PM2.5 Resolution: lug/m3TVOC Measurement Range: 0-3mg/m3TVOC Resolution: 0.001mg/m3CO2 Measurement Range: 400-5000PPMHCHO Measurement Range: 0-3mg/m3HCHO Resolution: 0.001mg/m3Temperature Measurement Range: 0-60Humidity Measurement Range: 0-99%RHCharging Interface: MIC USBBattery: 1200MAH Lithium Battery (shipped with built in battery)Product Size: Approx. 90 x 70 x 40mm / 3.5 x 2.8 x 1.6inWeight: Approx. 251g/8.6oz .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x IndoorAirQualityMonitor1 x Connecting Cable1 x User Manual