Eton Rugged Rukus
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.
A speaker driver is an individual transducer that converts electrical energy to sound waves. More drivers may result in better sound quality.
Vifa Stockholm 2.0
Meridian Explorer 2
Device is protected with extra seals to prevent failures due to any kind of weather.
With a detachable cable you can use alternative cables, and if the cable is pulled it will pop out instead of breaking.
Soundmatters FoxL DASH7
Devices with stereo speakers deliver sound from independent channels on both left and right sides, creating a richer sound and a better experience.
An amplifier is integrated into the device. An audio amplifier takes a small signal and makes it bigger without making any other changes in it which results in better sound, so any sound source can be connected to speakers.
More microphones result in better sound quality and enable the device to filter out background noise.
Amazon Echo Show
The battery can be recharged and used over again.
An indicator shows you when the device has low battery.
The time it takes to fully charge the battery.
WOWee One Slim
Amazon Echo Plus 2
An auxiliary input allows you to play other audio sources by connecting them through a simple audio connection like a 3.5mm jack, i.e for MP3 or portable DVD/CD player.
With more USB ports, you are able to connect more devices.
Wireless devices allow users more freedom of movement.