... speaker, digital speaker, mini speaker, speaker box mp3 speaker, portable speaker, digital speaker, mini speaker ... * Support SD/MMC card * Built-in mp3 player, FM radio, voice recorder, alarm clock, calendar, and thermometer * ... Support format: MP3, WMA, WAV, WMV, * Stereo audio output ... x 4, DC in 5v * Compatible with Windows98/2k/XP