A standard 3.5mm male connector is suitable for use with all MP3 players and computer sound cards.
87% have it
17. has an on-ear form
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.
22% have it
18. has a removable battery
The battery is removable and can be replaced by the user if broken.
6% have it
19. has an open-back design
The device is designed in a way that allows sound to go out through the back of the ear cups, which usually have vents or perforations. This design provides very natural and accurate sound.