Resistance to sweat makes it ideal for use while doing sports.
10% have it
19. 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
20. has a rechargeable battery
The battery can be recharged and used over again.
7% have it
21. has a 3.5mm male connector
A standard 3.5mm male connector is suitable for use with all MP3 players and computer sound cards.