CTH-609 dual temperature testing thermo-hygrometer can be placed or hung in living rooms, bedrooms, offices, warehouses, specially designed for monitoring outdoor temperatures in cold winters and monitoring temperatures in refrigerated warehouses. Monitor the indoor environment temperature and humidity and outdoor temperature at any time, monitor the temperature and humidity outside the frozen warehouse and the internal temperature, ensure a comfortable space and sleeping conditions, and ensure that the stored materials will not deteriorate. 

     Sensor: 1Temperature（inside） + 1 Humidity (inside）+ 1Temperature（outside)