With TVOC sensor, it can detect TVOC in the environment and understand the environment better.Real-time monitoring and real-time display of carbon dioxide concentration per cubic meter.This detector is small and portable, it can clearly display HCHO and CO2 concentration, ambient temperature and humidity, suitable for office, home, gym and other usage scenarios.It can detect and display the temperature and humidity of the environment to help users understand the environment.With alarm mode, color change allows users to pay attention to the environment. Product size: 118*70*34MM Weight: 226 G Measurement range: CO2 =400-5000PPM HCHO =0-1.712mg/m3 TVOC = 0-12.50 mg/m3 Temperature range = -20 degrees Celsius -60 degrees Celsius Humidity range = humidity 20-99% Color: Black Quantity delivered: 1 piece