With a detachable cable you can use alternative cables, and if the cable is pulled it will pop out instead of breaking.
We consider a lower weight better because lighter devices are more comfortable to carry. A lower weight is also an advantage for home appliances, as it makes transportation easier, and for many other types of products.
3.travel bag is included
The device comes with its own special case or pouch, which is useful for safe transportation.
4.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.
A long cable ensures more freedom of movement.
6.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.
The highest frequency at which device produces audio. The higher the high-frequency response, the clearer and crispier the treble.
The lowest frequency at which the device produces audio. The lower the low-frequency response, the stronger and juicier the bass.
3.sound pressure level
Devices with a higher sound pressure level are generally louder when supplied with any given audio source.
Impedance is the device’s electrical resistance to the current being pushed through it. The lower the impedance, the easier it is to get higher volume and requires less power.
5.driver unit size
The driver unit is the component that produces sound in the device. Bigger drivers are more powerful and can produce better bass.
1.has a removable battery
The battery is removable and can be replaced by the user if broken.
1.has a 3.5mm male connector
A standard 3.5mm male connector is suitable for use with all MP3 players and computer sound cards.
1.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.