The overall feeling of the earphone is quite good. In the later period, more consideration should be given to the structural problems. After a little adjustment, the problem is not big, but the charging box feels a little big, and the lid of the charging box is inverted according to the ordinary mold, and the unconventional mold cost is too high.

I also do earphone ID, the place between the back cover and the mold dividing line of the middle shell is too sharp, and the contact should be relaxed. it is suggested to find out more about the relevant knowledge points of the bottom draft angle mold design. if you do this, there will be problems with the mass production mold, and the clear modeling positioning is also a bright spot.