1、ACCURATE DETECTION: Can accurately detect various functions of temperature and humidity, formaldehyde, PM2.5, TVOC, with schedule, bring simple operation and easy setting 2、REAL TIME READING: Come with accurate measurement, accuracy to 0.1 degrees. Real time display of the value, the harm is clear at a glance 3、SOUND LIGHT ALARM METER: There is a support bracket on the back of the detector, come with sound and light alarm. When the air quality exceeds the limit, it will immediately send out an alarm sound and flashing reminder 4、EASY OPERATION AND ACCESSIBLE: This air monitor is easy to operate, just push function button and a full page design makes all real time readings easily accessible to everyone 5、FOR VARIOUS PLACES: Small and portable smart air quality monitor is suitable for laboratories, factories, workshops, warehouses, farms, etc. Item Type: Air Quality Detector External 5V sound and light alarm Measuring Range: -40~80℃ 0~99.9%RH Measurement Accuracy: ±0.5℃ ±3%RH Resolution: 0.1℃ 0.1%RH Temperature Alarm Upper Limit Value: (low temperature alarm value +1)~120℃; Temperature Alarm Lower Limit Value: -40℃ (high temperature alarm value -1)℃ Humidity Alarm Upper Limit: (low temperature alarm value+1)~99.9%RH; Humidity Alarm Upper Limit Value: 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. 1 x Environmental Detector 1 x Charging Head 1 x Charging Cable 3 x Expansion Screw