Hi guys, Welcome to the Advanced Video Search Engine, and you are watching 8시간 Black Screen 실제 신경 정신과에서 사용하는 심신 뇌파 안정과 숙면에 효과가 있는 음악. That video is uploaded by calm and sleep music at 2020-07-14T17:45:58-07:00. We are promoting this video only for entertainment and educational purpose only. So, I hope you like & enjoy it. [vXvsSSD7yzE]