Then the big test. In battery mode, tune the temperatures. But according to instructions and packaging used for battery operation only as a backup solution. So connected power supply and lo and behold ... within not even 5 minutes, the room temperature rises miraculously by approximately 1 to 1.5 °. Pulling the plug, the temperature drops relatively quickly back to normal. And even the humidity in the room is obviously measured wrong: two comparison units show 42 or 45%. This "Premium Weather Station" is 30%. All three devices were mind side by side.
Conclusion after two attempts with Technoline: Here someone tries to make big money with billigstem China garbage in a short time. My two comparative stations stood at 20 and 40 euros. This here is 100 costs and can not even display the correct room temperature! My recommendation: Stay away from Technoline products!