_x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ 3 in 1 Digital Portable CO2 Meter LCD Display Temperature Humidity Tester Carbon Dioxide Detector Air Quality Monitor for Home School Hotel Office Car _x000D_ Feature: _x000D_ 1. Three-in-One Functionality: The Portable CO2 Meter serves as a CO2 concentration detector, thermometer, and hygrometer, providing comprehensive environmental data in one compact device. _x000D_ 2. Convenient Battery Power: The Temperature Humidity Tester is equipped with a built-in 1200mAh lithium battery, rechargeable via USB, ensuring long-lasting performance without the hassle of frequent battery changes. _x000D_ 3. Color Display for Easy Reading: The Carbon Dioxide Detector features a vibrant color screen that displays current CO2 levels, temperature, and humidity. The color ring changes according to CO2 concentration, offering clear visual cues. _x000D_ 4. Simple Operation: With the Air Quality Monitor, simply press and hold the power button for 3 seconds to turn on or off. It automatically detects CO2 levels, making it user-friendly for all. _x000D_ 5. Compact and Portable Design: The CO2 Sensor is ideal for use in kitchens, living rooms, and bedrooms, or for taking on the go, ensuring you can monitor air quality anywhere at any time. _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ Specification: _x000D_ Tips: This product uses a semiconductor sensor with high sensitivity. However, it can only detect, and the data will not be very accurate (called qualitative but not quantitative). It can only detect mixed carbon dioxide, such as carbon dioxide exhaled by the human body, and cannot detect pure carbon dioxide. Description: This machine is equipped with a carbon dioxide sensor and a temperature and humidity sensor, which can measure the concentration of carbon dioxide in the air and the ambient temperature and humidity in real time. The measurement range of carbon dioxide concentration is 400-6000ppm. When the concentration is between 400-800, a green strip is displayed. This means that the concentration of carbon dioxide in the air is low and the air is in a normal state. The green and yellow bands are displayed at the same time between 800 and 1200, which means that the concentration of carbon dioxide is higher. In this environment, it is harmful to the human body, and green, yellow and orange stripes are displayed between 1200 and 1500ppm, indicating that the air is not good for the human body; if it exceeds 1500, the green, yellow, orange and red bands simultaneously show that the concentration of carbon dioxide is seriously exceeded. When it exceeds 5000ppm, it may cause suffocation or even death. You should open the window for ventilation immediately _x000D_ _x000D_ Parameters: _x000D_ Detection technology: semiconductor detection technology _x000D_ Measurement accuracy: 10ppm _x000D_ Applicable temperature: 1-70 _x000D_ Display mode: LED digital display + LCD screen + backlight _x000D_ Display: 2.8" LCD display _x000D_ Detection range: 400-5000ppm _x000D_ Working voltage: 5V _x000D_ Sensor: semiconductor sensor _x000D_ Battery capacity: 1200mAh, with power display _x000D_ Charging interface: Type-c 5V _x000D_ Shell material: ABS _x000D_ Product size: about 90.00x70.00x35.00mm _x000D_ Product size: 3.54x2.76x1.38inch _x000D_ _x000D_ _x000D_ Note: _x000D_ Due to different monitor settings and lighting conditions, the actual color of the item may vary slightly from the pictures. Thanks for your understanding! _x000D_ Please allow a 1-2 cm difference in measurements due to manual measuring._x000D_ _x000D_ 3 in 1 Digital Portable CO2 Meter LCD Display Temperature Humidity Tester Carbon Dioxide Detector Air Quality Monitor for Home School Hotel Office Car _x000D_ Feature: _x000D_ 1. Three-in-One Functionality: The Portable CO2 Meter serves as a CO2 concentration detector, thermometer, and hygrometer, providing comprehensive environmental data in one compact device. _x000D_ 2. Convenient Battery Power: The Temperature Humidity Tester is equipped with a built-in 1200mAh lithium battery, rechargeable via USB, ensuring long-lasting performance without the hassle of frequent battery changes. _x000D_ 3. Color Display for Easy Reading: The Carbon Dioxide Detector features a vibrant color screen that displays current CO2 levels, temperature, and humidity. The color ring changes according to CO2 concentration, offering clear visual cues. _x000D_ 4. Simple Operation: With the A