Devices with stereo speakers deliver sound from independent channels on both left and right sides, creating a richer sound and a better experience.
Resistance to sweat makes it ideal for use while doing sports.
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.
4.has a tangle free cable
The cable is designed to minimize tangling.
The earbud form is ultracompact and lightweight, with little or no interference with earrings, spectacles, hats, or hairstyles. For some people it is more comfortable than in-ear form.
An L-shaped plug is better if the jack is on the left or right side of the device, so that the cable isn't bent, and is less likely to break when the device is in your pocket.