The Kimura is designed to work with most MMCX and 2-pin IEMs; however, any non-standard shaped input jack may not be compatible. This is most likely to occur with recessed 2-pin jacks. The 2-pin version is 0.78mm, but should work with near-sized similar variants. We do not recommend swapping between different size 2-pin jacks frequently, as it adds additional stress on the jack.
We have a 30-day return policy if you encounter any unexpected incompatibilities. Please let us know what does and does not work, so we can begin compiling a list of known issues.