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.
31% have it
16. travel bag is included
The device comes with its own special case or pouch, which is useful for safe transportation.
63% have it
17. control panel placed on a device
There is a control panel on the device body, so you can easily access the volume control or remote without having to interact with a cable or another device it's connected to.
15% have it
18. has a 3.5mm male connector
A standard 3.5mm male connector is suitable for use with all MP3 players and computer sound cards.
86% have it
19. cable length
A long cable ensures more freedom of movement.
Pioneer SE-A1000: 6m
20. 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.
23% have it
21. has a removable battery
The battery is removable and can be replaced by the user if broken.