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 (MicroSD / TF card). 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 included 3.5mm audio cable to enjoy your favorite music.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. Be designed with two High-grade speaker and has built-in Mic,, powerful bass system, bring you superior sound effect. Best choice for listening to music / FM Radio, watching movie, chatting online, etc. Supports hands-free function, conveniently answer the incoming call during travel. Specifications: Type: Stereo headphone with Mic. Bluetooth version: 4.1. Operation Distance: 10m. Plug Type: 3.5mm. Color:White, Green, Blue, Black, Red (Optional). Support:Bluetooth, Aux in, TF Card, FM radio. The output frequency: Class 2. USB charging cable: AC input 110-240 V DC input 5 V. Frequency: 2.4 GHz 2.4835 GHz.