1、Accurate 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. 2、Simple And Intuitive: The carbon dioxide detector is equipped with a TFT smart color screen that displays clear digital readings for easy identification and reading. 3、Alarm Mode: The CO2 digital meter also features an alarm mode that alerts you to environmental safety through color changes. 4、User Friendly: Our carbon dioxide detector does not require calibration and can be tested when powered on. 5、Wide 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 Monitor Material: ABS Weight: Approx. 174g / 6.1oz Detection Technology: Semiconductor, Infrared, Laser Operating Temperature: 0-70℃ Display: TFT Full Color Screen Working Voltage: 5V Battery: 2000mah Polymer Lithium Battery (Included) Sensors: PM2.5 Sensor, Semiconductor Sensor, Electrochemical Sensor Detection Range: PM2.5 0-999 ug/m³, PM10 0-999 ug/m³, HCHO 0-9.999 mg/m³, Organic Pollutants (TVOC) 0-9.999 mg/m³, CO 0-1000 PPM, Carbon Dioxide 0-5000 PPM, Temperature 0-70℃, Humidity 0-99%RH, Air Quality Index (AQI) 0-500 1 x Air Quality Monitor 1 x User Manual 1 x USB Cable