u003cbu003eA:u003c/bu003eu003cspan style=u0022font-weight: 400;u0022u003e Every great MP3 player shall be small and compact so it can fit your pocket. In case you want to use it while working out, it should be very light. Also, a good MP3 player shall have enough storage space or at least have the ability to be upgraded. In addition, it shall have a durable battery, so you can rely on it at least for a whole day. Finally, we must not forget about the audio performance and supported file types. u003c/spanu003e