Devices with stereo speakers deliver sound from independent channels on both left and right sides, creating a richer sound and a better experience.
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.
Foldable devices are easier to transport and take up less storage space.
4.has a tangle free cable
The cable is designed to minimize tangling.
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 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.