2)More than 1000 tunes for selection and Customization can be accepted.
3)Pass related environment protection satandard: i. e. RoHS, REACH, 2005/84/EC in Europe; Less than Detection Limit for contained lead in USA.
4)Musical movements with drum shaft left thread
4)Musical movements with drum shaft left thread
5) 18-note
6) May select the size of the drum shaft
7) the thread of shaft is left thread.