... SD slot, it can be connected with MP3, MP4 ,very good used and cheap price,good for gift.Features:Compact and lightweight ... colors.Aluminum diaphragm micro-speaker, insure the sound quality.Circular design, exquisite appearance, with 6 buttons.Buttons definition: "ON/OFF", "Repeat", ... Manual Hot selling portable mini speaker with fm radio and MP3 Player support Micro SD TF Card ,easy to use and cheap ...