1>54 Key Musical Instrument 2>Microphone jack 3>suitable to kids 4>Guide A ... ,vibrato,transpose,metronome,rhythm programming,32-level metronome control,16-level volume control RecordB/W key record,play,rhythm programDemo Controlstart ... volume control Teachingguide A,guide BOuter Size850*330*120(mm) Output Power<4.8WAppendixpower adapter,operation instruction,music stand Product Display About ...