Feature: 1. MULTIPLE DISPLAYS: The air gas monitor has a large LED screen, with time, temperature, humidity, formaldehyde, PM2.5 and TVOC displays. 2. HIGH ACCURACY: The air quality monitor has accurate measurement, accurate to 0.1, to control the subtle changes in temperature and humidity. 3. COMPACT SIZE: The environment detector has support bracket on the back, and built in probe, compact in size, easy to carry and install. 4. EASY OPERATION: All real time data can be easily read by just pressing the function button and a full page design, convenient in operation. 5. WIDE APPLICATION: Powered by 5V USB, wide measurement range, suitable for laboratories, factories, workshops, warehouses, farms, etc. Specification: Item Type: Environment Detector Power Supply Voltage: USB 5V Measuring Range: -40~80℃, 0~99.9%RH Measurement Accuracy: ±0.5℃ ±3%RH Resolution: 0.1℃, 0.1%RH Temperature Alarm Upper Limit: (Low temperature alarm value + 1) ~ 120℃ Temperature Alarm Lower Limit: -40℃~(high temperature alarm value -1)℃ Humidity Alarm Upper Limit: (Low temperature alarm value +1)~99.9%RH Humidity Alarm Upper Limit: 1~(high temperature alarm value-1)%RH Formaldehyde Upper Limit Setting: (Low formaldehyde alarm value +1) ~ 9.99gm/m³ PM2.5 Upper Limit Setting: (Low PM2.5 alarm value +1) ~999ug/m³ TVOC Upper Limit Setting: (Low TVOC alarm value +1) ~ 99.9gm/m³ Scope of Application: Laboratories, factories, workshops, warehouses, farms, etc. Plug Type: US Plug 100-240V. Package List: 1 x Environment Detector1 x Charging Head1 x Charging Cable1 x Expansion Screw