... headphone: Play MMC / SD card, MP3/WMA files stored LCD screen display Netweight: 190g Polymer lithium battery ... MMC / SD card, MP3/WMA files stored Connected to the computer, read and write files to the MMC / SD card, Function ... quality sound effectsRechargeable polymer battery, convenient, practical,Up to 8-10 hours of practical timeTechnical specificationsItemSpecificationSupport Memory Card MMC ...