KKmoon Sport MP3 WMA Music Player TF/ Micro SD Card Slot Wireless Headset Headphone Earphone Black + Green Built-in TF/ micro SD card slot support up to 8GB TF/ micro SD card( card NOT included). Just save your loved songs in TF/ micro SD card and then play them with this sport player. Doubles as a TF/ micro SD card reader if connect it to computer. Supports MP3 WMA music format. Built-in rechargeable li-on battery and charge by USB cable. Easy to use,