These earphones are designed for Japanese ears, with a focus on flat to high frequencies, and are not suitable for those who prefer heavy bass. The current model has been upsized, making them tight for people with smaller ears. This type is likely suitable for average to small ear sizes. I purchased these new about six months ago and have used them about 10 times a month. There are no particular issues, and they function normally. I used them with a Google Pixel without any problems. The box, instruction manual, charging cable, and unused ear tips are included.