In order to develop the IQ, EQ, and CQ of babies around the age of 1,
it is necessary to always let them listen to various
fairy tales, nursery rhymes, classical music, and lullabies.
We at Dudron have developed a new media in the form of a credit card
that does not break even if baby is used roughly,
and have been selling Baby Audio since 2020.
The combo card,
which has been patented in the US and Korea,
has been developed to use audio and video together.