The product is a digital temperature, humidity and air pressure transmitter developed and produced by Dihui Technology. It is a digital temperature and humidity, pressure three-in-one transmitter. The product's temperature and humidity sensors use imported Sensirion sensors from Switzerland. The measurement data is stable, with high accuracy, strong anti-interference ability and long service life. It can be widely used in environmental computer rooms, airports, railway stations, commercial building control, family houses, office buildings, schools, conference rooms, shopping malls, hotels, gymnasiums, cinemas, libraries and other fields. It has a broad application prospect.