https://petergamma.org/category/eeg-devices https://petergamma.org/tag/openbci https://petergamma.org/tag/pi-eeg https://petergamma.org/tag/ads1299 https://petergamma.org/tag/openbci_made_in_china Pinephone (85) https://petergamma.org/tag/pinephone Peter Gamma from www.petergamma.org has spent a lot of time reviewing all of this products and did not find those very helpful for him personally up to the present day. And he will only give negative feedback about those until someone can convince him of the opposite.