For me, the best thermo / hygrometer

Meanwhile, we have this thermo / hygrometer available in almost every room, it is just great - and we really tried a few models over the years. The large display is easy to read, the batteries (1x AAA per unit) hold despite the large display very long (felt at least 1 year), even if the symbol is already asking to change the battery, the device can be operated for a long time, until the display Finally, paler.
Changing values ​​such as the airing of a room appear beautiful very quickly.
Have already placed side by side several devices to test the accuracy of measurement. The values ​​displayed are really almost the same, what's important for the comparability of the individual rooms.
The device can be either suspended, that is also provided to a fold-out holder.