The balance of a Bitcoin wallet, on a TRMNL ePaper display. Paste in a public wallet address and the screen shows what it holds in BTC and in US dollars, plus a candlestick chart of the Bitcoin price over the last 90 days.

You also get the price change over 7 days and 90 days, so you can see at a glance whether it was a good week. TRMNL only needs the public address, never your keys. Holding more than 1 wallet? Add the plugin once per address.