2. At most 3 outdoor units can be connected (one outdoor unit is equipped for conventional packaging) 4. The back of the host is equipped with a bracket, which can stand in a horizontal position 3. Two high magnetic magnets on the back shell of the host can be adsorbed on metal objects 1. Measuring indoor and outdoor temperature and humidity, Celsius and Fahrenheit conversion, maximum and minimum humidity memory function, can view historical temperature and humidity data 5. High sensitivity touch key control, easy to operate, Manufacturer: Littimoon