A straight plug is better when the jack is on the top or bottom of your player.
58% have it
21. compatible with Xbox Live
You can use your headset for in-game voice chat, private chat, audio for video chat, and in-game voice recognition using Xbox services.
28% have it
22. 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.
8% have it
23. has a battery level indicator
An indicator shows you when the device has low battery.
10% have it
24. has an L-shaped plug
An L-shaped plug is better if the jack is on the left or right side of the device, so that the cable isn't bent, and is less likely to break when the device is in your pocket.