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.
We consider a lower weight better because lighter devices are more comfortable to carry. A lower weight is also an advantage for home appliances, as it makes transportation easier, and for many other types of products.
This device comfortably rests on top of your outer ears. As it doesn't block out everything from the outside world, it's preferred in places like office environments and recommended for outdoor activities.
A long cable ensures more freedom of movement.
A coil cable offers more flexibility, as it can be further extended when in use, as well as retracted to take up less space when not in use.