Feature: 1. Scope 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 2. WIFI Module: WiFi air quality detector has WIFI module, which can use remote cell phone APP monitoring 3. Ventilation 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 4. Convenient and Practical: Smart carbon dioxide value tester uses an empty semiconductor TVOC sensor to detect air quality, temperature, humidity 5. ABS Material: Smart air quality monitor is made of ABS material, which is wearable and durable, and can be used with confidence Specification: Item Type: Indoor Air Quality Monitor Material: ABS PM2.5 Measurement Range: 0-999ug/m3 PM2.5 Resolution: lug/m3 TVOC Measurement Range: 0-3mg/m3 TVOC Resolution: 0.001mg/m3 CO2 Measurement Range: 400-5000PPM HCHO Measurement Range: 0-3mg/m3 HCHO Resolution: 0.001mg/m3 Temperature Measurement Range: 0-60℃ Humidity Measurement Range: 0-99%RH Charging Interface: MIC USB Battery: 1200MAH Lithium Battery (shipped with built in battery) Product Size: Approx. 90 x 70 x 40mm / 3.5 x 2.8 x 1.6in Weight: Approx. 251g/8.6oz. Package List: 1 x Indoor Air Quality Monitor 1 x Connecting Cable1 x User Manual