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4 Modes with 8 Volume Levels: Delmicure sound device can be customized to your individual needs with 4 modes and 8 volume levels. Enjoy Clear Sound - Our sound device has digital cores for natural and clear sound quality. Built-in Digital Chip: Built-in CIC chip provides a clear sound experience and improved noise reduction. Enjoy Clear Sound - Our sound device has digital cores for natural and clear sound quality.