Feature:1. Air Quality Detection: Four in one air quality monitor, mainly used for carbon dioxide detectors, hazard assessment, temperature and humidity detection, etc.2. Intelligent Detector: With intelligent alarm system, gas recognition algorithm, multi anti interference, air convection technology, greenhouse compensation calibration, detection is more intimate.3. Infrared Optical Detection: Use more professional infrared optical principles to accurately and quickly detect carbon dioxide, and the detection results are more reliable.4. Large Screen Design: Clear display, easy to read data. It is made of high quality materials, easy to operate and use, and has a long service life for monitor.5. CO2 Detector: High performance chip is accurate to display the current CO2 data, as well as temperature and humidity data, the color wheel will change according to the CO2 content.Specification:Item Type: Carbon Dioxide DetectorModel: ZN-AZ-2CO2Material: ABSBattery: 18650 1500mAh 3.7V (Built-in Battery)Charging Power Supply: DC 5V 500mA Micro USBPurpose: Suitable for carbon dioxide concentration detection in offices, homes, gymnasiums and other usage scenariosBasic Parameters:CO2 Measurement Range: 400-6000 PPM 50 5%PPMCO2 Measurement Accuracy: 1PPMTemperature Measurement Range: -10~50Temperature Measurement Accuracy: 1Humidity Measurement Range: 0%~99%RHHumidity Measurement Accuracy: 2%RH.Package List:1x Carbon Dioxide Detector1 x USB Data Cable1 x ManualNote:This product has a built in lithium battery. When operating with a standard DC5V charger, do not block the air inlet and outlet to avoid value deviation.Do not use it frequently in a dusty environment with poor air quality to prolong its service life.Do not use the device near high temperature, high humidity, dirt, or strong magnetic fields to avoid inaccurate values or internal circuit failure.Store the equipment and accessories in the temperature range of 20~55. When the ambient temperature is too low or too high, it may cause equipment failure.Please avoid exposing the equipment and accessories to rain or moisture, otherwise it may cause failure or risk of the display, battery, casing and circuit.Do not insert sharp objects such as pins into the air inlet, outlet or charging space to avoid damage to the device.