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.
Beats by Dre Mixr
Bowers & Wilkins P5 Series 2
22% have it
16. cable length
A long cable ensures more freedom of movement.
Pioneer SE-A1000: 6m
17. has removable speakers
This modularity allows you to integrate the speakers into hoodies or snowboard helmets.