Features: [Compact and Exquisite]: Compact body design, simple and stylish appearance, , and easy to carry. multiple ventilation holes designed for real-time air circulation convection. The sensor is in full contact with the air for high sensitivity and accurate detection of small particle content. [High Accurate Sensor]: Adopting non-dispersive infrared (NDIR) technology, it detects and accurately displays the carbon dioxide concentration in the air in real-time. Its high resolution of up to 1PPM and measurement accuracy of ±50+5% x the accuracy and reliability of the data. The device also integrates temperature and humidity detection functions, allowing you to keep track of the air quality around you wherever you are. [Intelligent Energy Saving and Humanized Design]: The display has an automatic brightness adjustment function that automatically adjusts the screen brightness according to the ambient light to conserve power. You can also monitor carbon monoxide levels even when the screen is turned off to conserve battery lifespan. It supports USB Type-C continuous power input and has a built-in 800mAh lithium battery to a long lifespan. [Convenient to Carry & Widely Used]: It adopts lanyard design for easy to carry. It can be widely used in a of occasions, such as homes, greenhouses, camping barbecues, factories, automobiles, environmental monitoring, and so on. This portable air quality tester adopts a stable performance and high detection accuracy sensor, supporting real-time monitoring of CO2 concentration, temperature, and relative humidity in the air. Digital TFT LCD display, with brightness automatic adjustable function, so you can see the readings at a glance. Equipped with air quality level classification function, power saving mode, Type-C interface detection, touching buttons, and other functions to meet your usage needs. There are multiple custom setting options, including screen off time, CO2 calibration, temperature unit switching, sound and vibrating switch, etc., which make your usage experience more personalized and convenient. 3D porous housing with multiple ventilation holes designed for real-time air circulation convection. The sensor and theair are fully contacted, highly sensitive, and accurate in the detection of small particle content. It can be widely used in a of occasions. Color: Black Material: Plastic The actual product may have slight color difference or difference, which will not affect the use Package Contents: 1 x CO2 Detector Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.