First. you needs to get this fits properly in your ears, and let it warms up for a while. Lightweight, nice shell but not scrach proof. The stock ear tips are terrible, hard and making strange sounds. Better finding a pair of memory form tips. The wire is also quite hard.
Under stock ear tips, fitting properly, it sounds better than expected for the price, having enough details and resolution. Tremble is good, having slightly deficiency or pitched. Sound field is AMAZING. Vocal is good for most of cases. Bass is almost same, hardly distinguish strength difference. Sounds turbid when rock. Some electronic music sounds excessively standing out, harsh sometimes which is the most annoying thing for this IEM. For most instruments, it's expression is bad, especially violin.
Under memory form tips, bass improved a little. Electronic sound is still annoying. Others mostly unchanged (as the stock tips can fit in my ears).
Overall, it is acceptable for a backup IEM, for portable devices. After you find the suitable ear tips, you will agree with me.
Under stock ear tips, fitting properly, it sounds better than expected for the price, having enough details and resolution. Tremble is good, having slightly deficiency or pitched. Sound field is AMAZING. Vocal is good for most of cases. Bass is almost same, hardly distinguish strength difference. Sounds turbid when rock. Some electronic music sounds excessively standing out, harsh sometimes which is the most annoying thing for this IEM. For most instruments, it's expression is bad, especially violin.
Under memory form tips, bass improved a little. Electronic sound is still annoying. Others mostly unchanged (as the stock tips can fit in my ears).
Overall, it is acceptable for a backup IEM, for portable devices. After you find the suitable ear tips, you will agree with me.