Hello Gualini,
Thank you for your question.
The science for measuring brain activity or EEG has been used for many years, since 1930 and is considered a safe and painless procedure. The actual data recoding and tests causes no discomfort. The electrodes record activity. They do not produce any sensation. It’s a passive data collection, no electricity is put into your body and no signals being sent to your brain while it’s carried out. Our products are fully certified for safety and wireless interference standards in Europe, Australia and North America and are fully CE-marked, which means it has been assessed by independent bodies for safety. You may refer to this link for the Safety Precausions of INSIGHT.
If you have other questions, please feel free to message back.