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.
16% have it
16. 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.
31% have it
17. has active noise canceling/noise reduction
This type of device allows you to listen at lower volume levels, causing less ear fatigue as you don't have to crank up the volume to overcome background noise. Ideal for plane rides and morning commutes.
12% have it
18. has a battery level indicator
An indicator shows you when the device has low battery.
10% have it
19. number of microphones
More microphones result in better sound quality and enable the device to filter out background noise.
Parrot Zik Sport: 8
20. has a 3.5mm male connector
A standard 3.5mm male connector is suitable for use with all MP3 players and computer sound cards.
85% have it
21. Bluetooth version
Jabra Elite Active 65t: 5
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.
23% have it
23. cable length
A long cable ensures more freedom of movement.
Pioneer SE-A1000: 6m
24. has a rechargeable battery
The battery can be recharged and used over again.
12% have it
25. maximum bluetooth range
The device can connect at a greater distance via Bluetooth or infrared to another device.