Nakamichi DM10 Demagnetizer Desmagnetizador
Nakamichi Head Demagnetizer 220 volts
Nakamichi DM-10 head demagnetizer for cassette, reel-to-reel or 8-track.
Used to suck out magnetism that accumulates in the tape head as you play tapes.
This is a later model/version as the on/off is indicated by a black (off) or red (on) dot on the slide switch.