The Multifunctional headphone combines the Bluetooth, Card MP3 player and FM Radio function, and supports hands-free function. With this product, you greatly enjoy the wonderful wireless music, listen to FM radio, and it also can be worked as a MP3 Player because it supports Memory card (TF card). if your music players (Such as, MP3 / MP4, etc.) have no Bluetooth function, you can connect the music players to the headset via the included 3.5mm audio cable. 4 in 1 Multifunctional stereo Bluetooth Headphone: Wireless Stereo Bluetooth + Card MP3 player + FM Radio + Wired Headset function. 3.5mm audio jack, provides a simple wired connection of a variety of music players (Such as, MP3 / MP4, etc.) without Bluetooth function. Easy to pair with almost any Bluetooth-enabled audio / music players devices, such as, Smart Phones, Tablet PC, Laptop, Notebook, etc. Two High-grade speakers designed, built-in Mic, with powerful bass system, bring you superior sound effect.