Specifications:

• PROTECT EVERY BREATH: Langkou Air Quality Monitor When it comes to your family's health, Langkou knows that every breath counts. Our 3-in-1 indoor air quality monitor (CO2/humidity/temperature) with powerful NDIR sensors, real-time detection of major CO2 air pollution, and simultaneous monitoring of ambient temperature and humidity, all displayed on an elegant clear LED display. Always protect the health of your family.
• PRO PRECISION SENSOR - The NDIR CO2 sensor is a professional grade particle sensor, the best chip for indoor air quality monitors. The large air inlet and outlet duct design allows the internal sensor to accurately analyze each particle, while CO2 concentration sampling takes only 1.5 seconds. By uniting the world's top technology, it provides you with the most accurate air pollution control.
• Sound alarm and CO2 concentration stage: This carbon dioxide detector is designed with 4 CO2 concentration stages: normal stage, warning stage, dangerous stage, very dangerous stage. With our carbon dioxide detector, you can set the alarm threshold between 800 and 2000ppm, and it will alert you when the detected CO2 concentration reaches the alarm threshold you set. Press and hold the "Down" button to turn the buzzer on or off.

Indoor Air Quality Monitor Portable Carbon Dioxide Detector CO2/Temperature/Humidity Meter NDIR Sensor Confined Space Air Monitor Alarm for Room/Car/School