Feature: 1. MULTI FUNCTION: Our air quality monitor could detect temperature, humidity, PM2.5, PM10, VOC, CH2O, CO2, with good sensitivity and excellent repeatability, short response time. 2. HD COLOR SCREEN: Equipped with 2.8 inch HD color screen, real time displays of gas concentration, view records, alarm settings, instrument calibration and other functions. 3. SOUND LIGHT ALARM: When the measured gas is higher than the set gas value, the sound light alarm function will turn on, and the sound is up to 80dB. 4. BACK SUPPORT: Designed with back bracket, the air pollution detector can be easily placed on the desktop, making the data viewing more intuitively. 5. WIDE USAGE: This air quality monitor is suitable for gas transmission and distribution, chemical medicine, painting workshop, refueling and gas station, etc. Specification: Item Type: Air Quality Monitor Material: ABS Voltage: 3.7V Power Supply: Built in 3.7V Lithium Battery 2000mah (Built in) Detection Function: Temperature, Humidity, PM2.5, PM10, VOC, CH2O, CO2 Measuring Range: PM2.5: 0-1000ug/m³ PM10: 0-2000ug/m³ CH2O: 0-1.999mg/m³ VOC: 0-9.999mg/m³ Display: 2.8 Inch HD Color Display Application: Gas Transmission and Distribution, Chemical Medicine, Paint Shop, Refueling and Gas Station, etc.. Package List: 1 x Air Quality Monitor1 x Charging Cable