This device complies with the purpose of degaussing, through the rubber coating damage to the heads is excluded in case of accidental contact. The operation is very easy and is described on the back of the package. After treatment, a noticeable improvement of the communication shall mean at two of my old cassette deck occurred, I had not expected this in this form so and was pleasantly surprised.
For fans of classic tape machines or cassette deck an absolutely useful product, compared with Demagnetisierungskassetten or Selbstbauten better solution determined.