blondynek102 wrote: (...)HW version: 2.1.RC20.4.1UU,
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I specified in post #111 - same HW version. Soft only older because it is running for probably 3 years

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I have a total of 2 pieces - they do not differ in anything, only in the menu there is a difference: the older one has only signal quality, and the newer one has quality and strength.
Both have a description:
WIWA H265 model
SW version: V5.00.49 Jan 3 2020 and V.5.2.1.16 Dec 13 2021 (almost 2 years difference)
HW version: 2.1.RC20.4.1 and 2.1.RC20.4.1UU
PCB I have not looked at this I don't know if there are differences in HW or if only SW sees it differently.
Strange that almost 2 years difference SW and bought within 2 months but I guess from different vendors. They work very well, even the quality changes from 70-90% and there is no problem, it only breaks when the quality drops around 50%, the signal must be at least 65%.