Table 11.

Essential features for BCI systems.

Key feature	Description
Effectiveness	The BCI system should be really helpful to users
Robustness	The system must be stable during regular use and robust with respect to anomalies
Quick operation	Task execution time should be as low as possible
More functionality	The system should allow the user to perform as many tasks as possible to increase the autonomy of the user
Safety	The system must pose no danger to user health
Comfort	The EEG cap should be comfortable to wear for several hours
Mobility	To ensure mobility, the BCI system should be wireless, lightweight, and compact
User-friendliness	The system should be simple to operate and need no expert help for daily use
Cost-effectiveness	The price should be affordable for all kinds of users