New Portable Cool Chic Block Brick Mp3 Player Support 1-8gb Tf Card Micro Sd Card Packet with USB and Earphone-- Green plastic shell, ultra-small size. Weighs less than 30g, simple and stylish. a digital music player supports MP3 music format. No memory built-in, only support extra TF (Micro SD) card Work time: Approx 3 hours USB1.1/2.0 interface, support hot-swappable, plug and play