Peter Gamma from www.petergamma.org found about smartwatches from DC Rainmaker: And what about the paper: Long-term meditators self-induce high-amplitude gamma synchrony during mental practice https://www.pnas.org/doi/10.1073/pnas.0407401101 Which was reviewed here on YouTube by Matthieu Ricard, Buddhist monk with a PhD. in Cellular Genetics? But products from VEDIA Switzerland are sold on YouTube as well: So how …