Devices with stereo speakers deliver sound from independent channels on both left and right sides, creating a richer sound and a better experience.
With a detachable cable you can use alternative cables, and if the cable is pulled it will pop out instead of breaking.
Foldable devices are easier to transport and take up less storage space.
The device comes with its own special case or pouch, which is useful for safe transportation.
The in-ear device is ultracompact and lightweight, with little or no interference with earrings, spectacles, hats, or hairstyles. It is inserted in the ear canal itself and blocks out a lot of environmental noise. It has stronger bass tones and is unlikely to fall out of the ear.
The cable is designed to minimize tangling.