... speaker,speaker box,portable speaker Mp3 Speaker,mini mp3 speaker,speaker box,portable speaker* Portable ... Built-in 1GB Flash memory * Built-in mp3 player, alarm clock, calendar, and thermometer * Support ... format: MP3, WMA, WAV, WMV, * Stereo audio output, ... USB 2.0 interface * Power: AAA batteries x 4, DC in 5v * Compatible with Windows98/2k/XP