Portable CO2 Meter Temperature Humidity Detector Air Quality Monitor TVOC HCHO Description: CO2 Detection Range: 400-5000PPM CO2 Detection Sensitivity: 1PPM TVOC Detection Range: 0-2PPM Temp Measurement Range: 0~50°C Temp Measurement Accuracy: ±1°C Humidity Measurement Range: 0%~99%RH Humidity measurement Accuracy: ±5%RH Charging Mode: DC5V 500mA micro USB interface Battery: built-in lithium battery 1200mAh Net weight: about 130g Features: 3-in-1: can use as a carbon dioxide concentration detection, thermometer and hygrometer at the same time. Battery supply: built-in 1300mAh lithium battery, use USB charging cable to charge it. Color screen: display the current CO2 data, temperature and humidity data. The colored ring will change according to the CO2 content. Easy to operate: long press the "on-off" key for 3 seconds to turn on and off. It will detect the CO2 automatically. Compact and portable: can be placed in the kitchen, living room, bedroom, or take it when going out. Package Includes: 1x CO2 Meter 1x USB Charging Cable 1x Manual