It charges conveniently through a USB-C connection, making sure that you can certainly recharge it even on the move. MP3 player - Just store your favourite music being an MP3 on a memory card (TF, Micro SD) and use the loudspeaker to be a jukebox or, alternatively, with Micro https://www.bluetoothspeaker.top/multi-functional-bluetooth-speaker-for-party-customization-with-dual-speakers/