I'm not completely sure about this answer. The information I have indicates that the RoomLogg PRO weather station works with a 5V DC / 0.55 A power supply. However, I do not have detailed information on the compatibility of the power supply with an input voltage of 127 V. To obtain a precise answer regarding compatibility with this specific voltage, I recommend that you consult the complete documentation for the power supply unit or contact DNT customer service directly.
The device comes with 5 thermo/hygro sensors included. It also supports expansion with up to 8 wireless thermo/hygro sensors for monitoring multiple rooms.
dnt is part of ELV Elektronik, which produces 100% of its products in the group's own factory in Zhuhai, South China. (https://de.wikipedia.org/wiki...)