7.83Hz Version Small -Low Frequency\nPulse Generator Tools for Promoting9721\n\nConsolidate your memory while you sleep\nProduct size is compact and easy to carry\nSuitable for improving inspiration when thinking\nStimulates the brain into deep sleep\nSuitable for stabilizing the mind while meditating\n\nUse Introduction.\nAvailable Type-C interface universal cell phone power cord plugged into the interface energized, the indicator light is on can be used, do not need any adjustment operation;. wave suitable for quiet environment space, directly flat or vertical: placed on the desktop about 1 meter high, about one meter away from people. A wave generator is suitable for about 10 square meters of space range, the space increases, the number of wave generator should also be increased. (Friendly reminder: this instrument has no battery can not be charged, connected to the USB cell phone charger can be, unlimited current )\nIt is normal for each person to experience different results\)