Andrew Huberman· PhD
So, we put a band around your neck, looks like Bose headphones or, you know, Beats headphones around it, that has got a coil. - Mm-hmm. - There's a coil in that device. - The two coils are aligned, just like your phone. When you put your phone on it, you don't plug it in. - Mm-hmm. - The coils align. - That now turns it on, because the device has no battery.