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 ... adapter (Not included)13) External speaker14) Outer earphone, outputportable roll up piano Specifications: 1) Output power: 500mW2) Output voltage: ... 1 pc / gift box, 12 pcs / cartonportable roll up piano Outer packing:12pcs/ctnCarton dimensions: 65.5 x ...