The smallest and simplest MP3 player. Although also in the concept.
Sizes slightly larger headphone jack. Apparently the principle of playing is the same as that of iPod shuffle.

It is recharged and “replenished with music” as follows:

At the same time performs the function of a joystick to listen to music on the docking station.
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The idea is good, although it is not clear how charging and downloading music through analog jack will go.
However, I think that it would be much better to do the opposite - on the player itself, it’s not “Dad” to do, but “Mom”. Firstly, it will look more aesthetic. Secondly, there will be full compatibility with standard headphones. And so - in order to connect non-native headphones, you will have to use the mother-to-mother adapter, which will increase the overall size and generally uncomfortable.
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