Piano and Violin Learning Pen

Piano and Violin Learning Pen
Piano Learning Pen is high-tech musical learning assistant product which is perfect combination of traditional arts and the latest digital technology. The real time, hi-efficient and practical guidance function of this product essentially resolves a lot of problems encountered in the process of piano learning. Combined with the richest, fattest and fullest piano sound, this Piano Learning Pen provides a relaxed, pleasant and interactive learning method and serves as a good teacher and helpful friend. what do you think is it realy work?