This 4-in-1 indoor air quality monitor is an essential tool for keeping your home or office environment healthy. It detects carbon dioxide levels, as well as temperature, humidity, and air quality, giving you a comprehensive understanding of your indoor air. With its portable design, you can easily move it from room to room to ensure that you are always breathing clean air. The device is made by Langkou and has a model number of LC-1038. It is ideal for use in a variety of settings, from homes and offices to schools and other public spaces. New open box