portable roll up piano 49 standard keys ,roll up piano 3 digitals LED digital displays,roll piano Record, play,roll piano portable roll up piano features:1)A ... adapter (Not included)13) External speaker14) Outer earphone, outputportable roll up piano Specifications: 1) Output power: 500mW2) Output voltage: 6V3 ... 42 cmN.W.: 9.5 kgsG.W.: 14 kgs portable roll up piano Conveyance:Qty/1 x 20" FCL: 3, ...