... quality & low price 4.OEM & ODM welcome Portable Mini mp3 Speaker with SD TF MMC Card We are a ... of usb speaker,mini speaker,active speaker,portable speaker,computer speaker,MP3 speaker,MP4 speaker, SD card speaker, ... function speaker.8.Compatible with various bluetooth phones,MP3/MP4/CD/PC/MAC/PSP ect.9.Built-in ... lithium battery speaker.10.Plays MP3 format audio files from ...