Feature 1Accurate HCHO Measurement: Our air quality monitor utilizes a high performance chip to capture weak currents generated during the electrochemical reaction, providing precise measurements for HCHO. 2Simple And Intuitive: The carbon dioxide detector is equipped with a TFT smart color screen that displays clear digital readings for easy identification and reading. 3Alarm Mode: The CO2 digital meter also features an alarm mode that alerts you to environmental safety through color changes. 4User Friendly: Our carbon dioxide detector does not require calibration and can be tested when powered on. 5Wide Applications: Our smart air quality monitor is suitable for various places such as agriculture, greenhouse vegetables, production warehouses, material processing, gyms, indoor spaces, cars, offices, ect.Item Type: Air Quality MonitorMaterial: ABSWeight: Approx. 174g / 6.1ozDetection Technology: Semiconductor, Infrared, LaserOperating Temperature: 0-70Display: TFT Full Color ScreenWorking Voltage: 5VBattery: 2000mah Polymer Lithium Battery (Included)Sensors: PM2.5 Sensor, Semiconductor Sensor, Electrochemical SensorDetection Range: PM2.5 0-999 ug/m, PM10 0-999 ug/m, HCHO 0-9.999 mg/m, Organic Pollutants (TVOC) 0-9.999 mg/m, CO0-1000 PPM, Carbon Dioxide 0-5000 PPM, Temperature 0-70, Humidity 0-99 percent RH, Air Quality Index (AQI) 0-500 .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 Air Quality Monitor1 x User Manual1 x USB CableNoteWhen powered on, the data may be unstable and will continuously change. It needs some time to stabilize.