Yeah this clock is quite large. It measures 22x8.5cm or 8.6x3.3".

It's been running 1 week now and I've set it to show BTC/USD permanently, but with a LED flash every time a block is mined. Unfortunatelyu you cannot set it to show blockheight for xx sec and then return to BTC/USD. (or I did not find a setting that does it).

I have no clue where it gets the data from. But a setting is active that says 'use BTClock data source' and not the Nostr datasource.