This detector is small and portable, can clearly display HCHO and CO2 concentration, the temperature and humidity of the environment, suitable for office, home, gym and other use scenarios.   Features:   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, users are prompted to pay attention to the environment.   It has long service life and can be charged with USB cable.   Small and portable, easy to carry, does not take up too much space, can be installed in the home   Safe range:   a.CO2: 350~2000 ppm   b.TVOC: 0.000-2.000mg/m³   c.HCHO: 0.000-1.000 mg/m³   d.temperature: 0~90   e.humidity: 0~99%RH   Packing List:   1 * Detector   1 * USB Cable   1 * Manual