... , MP4,DVD player, and any portable audio devices by the stereo jack output 1.Compatible with USB and stereo speaker2.Extensive application3. ... 7.Audio format: MP38.Transport: USB 2.0 full speed,9.Audio source: USB flash drive,SD card,MP3,mobile phone,PC, notebook ... for additional adapter/extra power.12.Ideal for gifts and promotional items. Portable MINI multimedia speaker with U disk and SD card port