So the thermometer is just as accurate as the here:
Probably has to do with the fact that it is indeed from Hama Alarm Clock also an identical model of Technoline. But the Thermoter of Techno Line is supposed to be pretty accurate (according to their reviews), which confirmed my previous experience as well.
Otherwise, the Hama-alarm everything has been positive already said in the other reviews really. I have the device but only since yesterday, but so far I am fully satisfied with it.