I will introduce the knockoff SONY sport MP3.
The MP3 is combined with the headphone and the fixed head takes the place of the headphone wire, so it will not fall when you take sports. The memory is 2G and it looks like a heart.
All the buttons and interfaces are on the right of the headphone. When you charge the MP3, you should turn on the switch. It should be charged for two or three hours. It will switch songs when you press the volume button for a short time and it will control the volume when you press the button for a long time. The earplugs are introduced soft rubber so the acoustic isolation is good. You will be comfortable with the earplugs.
There are three colors can be chosen and the price is around $4.6 USD. It is very cheap.