3 in 1 Multifunctional stereo Bluetooth Headphone: Wireless Stereo Bluetooth + Card MP3 player + Wired Headset function. Moreover, don't worry if your music players (Such as, MP3 / MP4, etc) have no Bluetooth function, you can connect the music players to the headset via the 3.5mm audio cable(not included) to enjoy your favorite music.
