Features:  1. 5-in-1 function: The air quality detector is small and portable, and can accurately measure CO2 concentration, TVOC, HCHO, temperature and humidity.  2. Air convection design: Convection air is formed by openings on both sides and back of the detector, and real-time convection detection is more accurate.  3. NDIR sensor: Using NDIR sensor, it has good precision, stable performance, strong anti-interference ability, low consumption and long service life.  4. One-button switch for full control: press and hold the power button for 3 seconds to turn on/off and then you can turn it on automatically detect the surrounding environment.  5. Applicable occasions: The air detector is mainly used in living rooms, schools, hospitals, gyms, cinemas, offices, breeding greenhouses and other places.    Note:  1. Due to manual measurement, there will be a 1-2 mm error in the size. Thanks for your understanding.  2. Due to different light conditions and different monitors, item color displayed in photos may be showing slightly different from real object.    Specifications:  Color: White / Black ( Optional )  Material: ABS + Electronic Components  Sensor: NDIR  Screen Size: 2.8 inches  Screen Resolution: 240*240  Display: LED Digital Display + Backlight + LCD Screen  CO2 Detection Range: 400-5000PPM, ±50±5%PPM  CO2 Deletion Sensitivity: 1PPM  TVOC Detection Range: 0-2.0mg/m³  HCHO Detection Range: 0-0.6 mg/m³  Temp Measurement Range: -10℃~+50℃  Temp Measurement Accuracy: ±1℃  Humidity Measurement Range: 0%-99%RH  Humidity Measurement Accuracy: ±2%RH  Charging Mode: DC 5V 500mA Type-C Interface  Battery: Built-in Lithium Battery 3.7V 1200mAh  Item Size: 9.2*7.2*3.7cm / 3.62*2.83*1.46in ( L*W*H )  Packing Size: 14*9.8*5cm / 5.51*3.86*1.97in ( L*W*H )  Net Weight: 116g / 4.09oz  Gross Weight: 218g / 7.69oz    Package List:  1 * Detector  1 * USB Charging Cable  1 * Instruction Manual ( English, Japanese, Italian, German, Portuguese, Spanish )