Bluetooth MP3 Headphone (E68) is not only a Bluetooth headphone, but also a MP3 player. It has a built-in a micro SD(HC) card Slot which can read micro SD(HC) memory card for playing MP3/WMA audio files directly. It also allows to connect to all iPods, MP3, MP4, MD, CD player, notebook, PC, PDA, PSP, mobile phone and other digital products with 3.5mm stereo audio connector. Built in rechargeable battery.