Devices with stereo speakers deliver sound from independent channels on both left and right sides, creating a richer sound and a better experience.
With a detachable cable you can use alternative cables, and if the cable is pulled it will pop out instead of breaking.
The in-ear device is ultracompact and lightweight, with little or no interference with earrings, spectacles, hats, or hairstyles. It is inserted in the ear canal itself and blocks out a lot of environmental noise. It has stronger bass tones and is unlikely to fall out of the ear.
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.
A long cable ensures more freedom of movement.
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.
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.
The device's battery life (when in use) as given by the manufacturer. With a longer battery life you have to charge the device less often.
Sennheiser PXC 480
The battery can be recharged and used over again.
The time it takes to fully charge the battery.
Sony Xperia Ear Duo
Sennheiser IE 80S BT
Wireless devices allow users more freedom of movement.
The device can connect at a greater distance via Bluetooth or infrared to another device.
Device supports fast Bluetooth pairing using NFC so it can communicate with other devices over Bluetooth. You can fastly pair devices without entering a code by simply holding one device next to the device with which it is to be paired.
A headset is one headphone or pair with a built-in microphone. Headsets can be used for applications which require communication i.e. Skype, games with voice chat, mobile phones etc.
There is a control panel on the cable, so you can easily operate the device without having to interact with it.