... player, and any portable audio devices by the stereo jack output 1.Compatible with USB and stereo speaker2 ... notebook, PC, MP4,DVD player, and any portable audio devices by the stereo jack output. 5. ... format: MP38.Transport: USB 2.0 full speed,9.Audio source: USB flash drive,SD card,MP3,mobile phone,PC ... Ideal for gifts and promotional items. Portable MINI multimedia speaker with U disk and SD card port