This stereo audio amplifier kit can be used with any personal stereo equipment, including MP3 players. It can be powered by a 9V battery connected to the PP3 clip or you can use a power supply in which case you would need to buy a 2.1mm PCB Mount DC Socket and solder that to wires which you would then in turn solder to the PCB in place of the PP3 jack. It uses a TDA2822M audio amplifier IC which https://elecena.pl/product/16395879/stereo-amplifier 2020-04-06 https://elecena.pl/product/16395879/stereo-amplifier 2020-09-01 https://elecena.pl/product/16395879/stereo-amplifier 2021-03-02 https://elecena.pl/product/16395879/stereo-amplifier 2023-05-25 https://elecena.pl/product/16395879/stereo-amplifier 2025-07-09