Libratone One Click
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.
Meridian Explorer 2
Device is protected with extra seals to prevent failures due to any kind of weather.
Soundmatters FoxL DASH7
Scosche boomBOTTLE mini
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.
Devices with a subwoofer have a higher quality, deeper bass.
The battery can be recharged and used over again.
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 a standard mini jack socket, you can use the device with most headphones.