Where do you get these?
Discussion
Blockstream released a mining firmware for its jade hardware wallet on April fools day😂 so but it actually works though for real but incredibly low chances for finding a block since its solo mining at very low hash rate. But totally cool feature though.
I mean low cost and low chance, not much of a loss, but potentially very high reward. 1/4 milli in return. You will never spend that much trying to earn the block reward.