MMCX plug parts and 3.5 mm mini-plug parts that are prone to breakage, those that normally pass about 5,000 flex tests are designed to withstand over 50,000 flex tests.

A stable sensation of fit is achieved by contact with three parts of the ear. As illustrated in the below diagram, the pink areas comprise one point of contact (ear pocket), the green areas comprise on point of contact (earpiece) and a blue area (tragus) comprises the third point of contact. Compared to a shape that comes in contact with an organically large area of the ear, the limited contact area of this shape conforms to the ears of many users. Elasticity of silicone, etc. is not employed. There is no oppressive force on any of the points of contact in the ear, and this gives the earphone a sense of conforming fit. Suffice to say that this provides the superior sensation of fit worthy of a customized earphone.

With similar existing products, it was assumed that they would be fitted to ears of differing sizes; not only were they large in size, their appearance was rather too distinct, and it took a lot to get accustomed to fitting them. Having considered what the key to fitting the ear hooks was, we discovered a form that was smaller than existing ear hooks, that didn’t utilize metal or resin wires and fits the ears of more people. Made of soft silicon, they make for a comfortable fit.