2Pcs Piano Hand Shape Corrector Hand Strengthener Posture Correction Tool Pia QH

--\n\nFeature: \n 1. \u3010Built-in Piano Sound Source\u3011: This piano hand shape corrector and strengthener comes with a built-in piano sound source, allowing you to perform a mini concert anytime, anywhere. Even without a physical piano, you can still play music and practice techniques while training your ears.\n2. \u3010Integrated Speaker\u3011: Equipped with a dual voice coil strong magnetic speaker, this device delivers loud volume and clear sound quality. This enhances your practice sessions and makes them more enjoyable and effective.\n3. \u3010Piano Hand Shape and Strength Training\u3011: Designed to mimic the shape of a piano hand, this device helps to correct your hand shape and make your training more scientific and precise. It promotes relaxation of the hand muscles and encourages more scientific force application, enhancing coordination and doubling the efficiency of your practice. \n\nSpecification: \nFeatures:\n\n\u3010Built-in Piano Sound Source\u3011: This piano ha-