Muse 2 brain sensing headband for meditation Excellent used condition It uses EEG brain wave detectors on the band (the same technology they use for evaluating seizures) to provide real time feedback for meditation. If your brain gets distracted, the music or background gets a bit louder and reminds you to re focus. This device was fantastic for helping me learn to meditate. I just don’t need it anymore! The app is free and easy to use. I included photos of my session this morning so you could see it still functions perfectly. Retails for $250