1、BACK CLIP DESIGN: Music player is designed with a back clip, you can attach it to your clothes or equipment, convenient for you to use when you travel and also when you exercise. 2、MEMORY CARD SUPPORT: MP3 player has a memory card slot, it supports expansion up to 8GB, you can use the memory card to store more music. 3、PORTABLE: Back clip player is light weight, small and easy to carry, it doesn't take up much space and can be worn when you are out and about. 4、LONG WORKING TIME: Back clip MP3 battery life is long and can work up to five hours, so you don't have to worry about running out of power when you go out, and it's more convenient to use. 5、DURABLE MATERIAL: MP3 music player is made of premium ABS material, with guaranteed quality, long service life, durable and not easy to damage, making your life better.