I ran across a new EEG device on kickstarter today, called Narbis. It uses gold plated dry electrodes ( they even put a schematic of the electrode amp on the kickstarter page), and the basic model has one acitve electrode site (at Cz it looks like).
It’s wired to a bluetooth module that you wear on your arm (a little bit clunky compared to other headsets) which connects to their app. Neurofeedback is done with the lenses, which change their opacity based on the feedback parameter.
I’d be interested in what anyone else’s opinion is.