Material: ABS plastic + MagnetWeight About: 600g/1 PieceColor: Show as the pictureSize About: 23cm x 2.5cm
1.Assemble and insert the corresponding groove opening.2.Manually toggle the date, month and period through 3 small balls.3.The magnetic ball and the ring attract each other.4.Because of the cotton thread, the ball is at a certain fixed point of the fixed air ring, which refers to the month.5.The small ball that is attracted to the transverse rod points to the date.