... MP3, MP4, a variety audio formatsIt is a Karaoke player, it is a mp3, it is mp4, it is card reader, it ... is a digital ablum, it is also ... a audio speakerProduct main functionAs a karaokeSupport the KOK video image format and MP3( ... synchronous format, sing at anytime and anywhere.Support MP3, Mp2, wma, wav and etc formatHigh-quality ...