Not super portable, but portable. Plus, Sonos Play:1 and Connect replacements.
Sonos finally makes a portable Bluetooth speaker—meet the Sonos Move
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Review: New Sonos Era 100 - The Next Level Audio Speakers
Sonos finally makes a portable Bluetooth speaker—meet the Sonos Move
Sonos Move review: brilliant sound now portable, Digital music and audio
Full transcript: Sonos CEO Patrick Spence on Too Embarrassed to Ask - Vox
The Best Bluetooth Speakers
The durable, battery-powered smart speaker for outdoor and indoor listening Easy to use - Setup takes minutes, and control is simple with the Sonos
Sonos Move - Battery-Powered Smart Speaker, Wi-Fi and Bluetooth with Alexa Built-in - Lunar White
Best Portable Speakers, According to Strategist Editors 2021