Dorsey, who is also founder and CEO of fintech company Square, is famously a cryptocurrency evangelist. In early February, he set up his own bitcoin node, which means he’s tapped into the system that makes bitcoin work on a technical level. Later that month, Dorsey announced that he and Jay Z had invested 500 BTC in an endowment to develop bitcoin in Africa and India. At current exchange rates, that translates to nearly $26 million—a conversion you’d know at a glance if you, like Jack, owned a BlockClock Mini.

For those of you who see this insufferable device and think, “hell yeah, I need that,” you can order the BlockClock Mini at Coinkite for $400 (0.0078 BTC).