ELEGIANT Sport Run Wireless Headset Headphone Earphone MP3 Music Player Micro TF SD Slot Wire free head-loop MP3 player, especially designed for sport lovers, comfortable and secure for most users: bicyclist, runners, joggers, walkers, etc. Incorporating the behind-the-neck, over-the-ears design, wrap around wire free headphones, designed to stay on your head. Supports MP3 WMA music format with great quality, super stereo sound lets you enjoy your sports and music at the same time. 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. Built-in rechargeable li-on battery and charge by USB cable, easy to use,