Portable CO2 Meter Handheld CO2 Detector Monitor 0~9999ppm, Carbon Dioxide Meter with Alarm Function, Temperature & Humidity Meter NDIR Sensor Air Quality Monitor for Home Trip Classroom and Office

HIGH ACCURACY: CO2 Accuracy 0~2000ppm(±50ppm or ±5% of the reading); 2000~9999ppm(±10% of the reading);
LARGE MEASURING RANGE: CO 2: 0 ~9999ppm;
Temperature: -10~60°C(Accuracy ± 0.6 °C);
Humidity: 0.1 % ~ 99.9 %RH(Accuracy ±3%RH);
Dew Point: - 20.0 ~ 59.9 °C;
Wet Bulb: - 5.0 ~ 59.9 °C;
USER FRIENDLY: Portable Handle Design; Easily manual calibration on CO2 and humidity; Stable NDIR CO2 sensor;
POWER SUPPLY: Dual power source battery (included) or 9V adaptor (NOTED: adaptor is not included in set); Power from battery is automatically cut off when 9V adaptor is in use;
APPLICATION: IAQ monitoring and survey; especially on CO2 level and air ventilation become widely applied in public areas such as offices; classrooms; factories; hospitals and hotels