DigitalHands USB Sport Running MP3 Music Player SD/TF Cards Slot Handsfree Headset Wireless Headphone Earphone MP3 Player with FM Function (Black) Built-in SD/TF card slot. (SD card NOT included) Just save your songs in your SD/TF card and then get it played with this sport player. Be able to use directly as a USB portable disk. Just save your files in it! Capacity: No memory inside! support SD/TF card Support MP3 WMA WAV music format. Built-in rechargeable li-on battery.