Multi function can be used as an ordinary violin violin piano, can also be used as electro acoustic violin. The sole has independently developed the new international leading electro acoustic pickups, the sound quality is much higher than that of foreign piezoelectric ceramic pickup, high sensitivity is also no longer need battery and special amplification circuit, as long as the microphone input hole audio line into ordinary speakers. Can the speaker can adjust the electro acoustic violin sound delay, adjust the volume, the sound quality is better than the ordinary violin.