... SD card 2,Apply to mobile phone, computer, MP3/MP4,digital devices Overview : Complaint to FCC, CE, RoHSMini size, cute, compact ... / MMC card and U disk reads, support for MP3 format music files2,Can be connected to mobile phones, computers, MP3 players ... port, optional power adapter for use.Apply with all music players and digital products with 3.5mm audio plugs. Specification :Rared power ...