This dataset contains EEG data from a study investigating the performance of two portable EEG systems (i.e., the EMOTIV EPOC Flex and the BrainProducts LiveAmp) to a lab-based system (i.e., the BrainProducts BrainAmp). The study employed a within-subjects design, divided into three sessions, each featuring a different EEG system. Participants completed all sessions, which included five tasks administered in the same order. The sessions were counterbalanced. The task order was as follows: 1) Steady State Visual Evoked Potential (SSVEP), 2) active auditory oddball, 3) passive auditory oddball, 4) face perception, and 5) resting state.