Impedance is the device’s electrical resistance to the current being pushed through it. The lower the impedance, the easier it is to get higher volume and requires less power.
2.Has a detachable cable
vs No (64% don't have it)
With a detachable cable you can use alternative cables, and if the cable is pulled it will pop out instead of breaking.
3.Has an in-line control panel
vs No (56% don't have it)
There is a control panel on the cable, so you can easily operate the device without having to interact with it.
4.Reasonably more microphone(s)
vs 1 (the average)
vs 8 (best: Parrot Zik Sport)
More microphones result in better sound quality and enable the device to filter out background noise.
5.Has an on-ear form
vs No (78% don't have it)
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.