Melomind claims to be an EEG headset capable of sending feedback to the brain of its user about how well is it performing vis-a-vis stress.
It believes that with a little training, the brain has the ability to reduce the impact of stress and protect against its negative effects
Melomind is based on Neurofeedback, which has been studied by neuroscience laboratories all around the world.
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More information on this can be found here.