With TVOC sensor, it can detect TVOC in the environment and better understand the environment. Real-time monitoring and real-time display of carbon dioxide concentration per cubic meter. It can detect and display the temperature and humidity of the environment to help users understand the environment. It is suitable for office, family, gym and other occasions, with a wide ranges of applications. Intelligent color screen display, the number is clear, easy to identify and read. With alarm mode, through color change, users are prompted to pay attention to the environment. It has long service life and can be with USB cable. Small and portable, easy to carry, does not take up too much space, can be installed in the home. colour: black Material: plastic Package Contents: 1 x Air detector 1 x USB cable 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.