well-intentioned, solved suboptimal

The Amazon version my Büglen seemed sensible at the time, especially since I give Amazon a brand a certain leap of faith.
But the reality is, you get a kit supplied. You have the bracket mounted and self-assemble at the correct distance so that it afterwards holds in the ear.
That's a shame, because the manual is only of limited help ..
The price can you expect that this will be offered as a complete solution.
To wecheln The earplug is the next frontier, without problems, but the rearing of new plugs is a legit!

The build quality is ok and according to the price.
The ausgleobte sound quality but most let me down.
We must clearly say that the Amazon headphones sound not with the Apple headphones (13.50 at Amazon) can compete in the least.
Rich bass are a nil return, although I have tried all the plugs in order to improve the result.

My recommendation for Apple Phone users, prefer to stay with the original, the Amazon headphones are indeed loud in any case, but that is going strong at the expense of sound quality. Better to occasionally press the Apple headphones back ear ..
If I had the headset is not already used, I would return it, because that's not what you would expect in the Amazon brand as the sender ..

Good:
a lot of plugs for all kinds of ear molds (6 versions)
a bag for storage and transport
good workmanship