The previous information is correct. J̇'d add that you can also power the weather station by inserting three AA batteries. However, in this case, the station's backlight only lasts for nine seconds after pressing a button on it....
The NT for the indoor unit has, according to the symbol on the NT, 5V AC! and 0.15A and is a standard plug-in power supply. The outdoor sensor has batteries. Greetings Mark