Flash mp3 players, jog me, shake me, play me.
Flash mp3 players are astounding devices. Being truly solid-state, they can withstand environments that would incapacitate, or damage, other kinds of music playing devices. If you're an active person, flash mp3 players are the right option for you.
Flash mp3 players store their songs in memory. That is called the flash memory,and retains its data. the mp3 songs even if there's no power. No need to worry about losing all your songs if you run out of batteries. In the beginning, flash memory was expensive, and you could only find models with limited capacity, only being able to carry a few hours worth of high quality mp3 songs. But today, with mp3 players getting cheaper and cheaper, you can now find mp3 players with large capacity flash memory, storing a whole lot more.
By not having any moving parts, flash mp3 players have no problem being thrown around while operating. You won't notice any skipping,and won't have to worry about damaging it. With flash memory in mp3 players getting bigger with each new model, maybe someday it will even replace Hard disk mp3 players. But for now, the existing mp3 models will already probably be enough for you to have all your songs.