Well, what can I say. Growing up in the 90s, in the era of Abibas and Pawasonic, nevertheless, I was shocked by the quality of our Chinese friends' products. For the sake of technical interest, I installed a second ULF chip and a second speaker, and the Instrument acquired a stereo (you can hear it in styles) sound! And the sound became clearer. Also, so that there is no overload, I added a resistance between the chip output and the ULF input. Instead of a micro USB connector, I just attached a wire with a USB plug. Indeed, since then the Instrument is still alive, sometimes we indulge. Still, if you feel sorry for the hearing of your children, I advise you to choose a model a little more expensive.