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
The driver unit is the component that produces sound in the device. Bigger drivers are more powerful and can produce better bass.
Meridian Explorer 2
Soundmatters FoxL DASH7
A remote control allows you to control the device remotely. The remote control can be included or optional.
A passive radiator looks like a normal driver (speaker) from the front, but on the backside all of its 'guts' are removed. Passive radiators allow woofers to produce deep tones that otherwise may not have been possible. They can have the same sonic output as larger speaker cabinets, but in a much smaller size.
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.
The time it takes to fully charge the battery.
WOWee One Slim
The device can connect to WiFi.
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.
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.
With more USB ports, you are able to connect more devices.
A standard 3.5mm male connector is suitable for use with all MP3 players and computer sound cards.
Wireless devices allow users more freedom of movement.