A standard 3.5mm male connector is suitable for use with all MP3 players and computer sound cards.
87% have it
16. 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
17. has a rechargeable battery
The battery can be recharged and used over again.
8% have it
18. warranty period
When covered under the manufacturer’s warranty it is possible to get a replacement in the case of a malfunction.