The UE Megaboom 3 has what you want in a portable Bluetooth speaker: good sound quality, long battery life, ruggedness and more.
ULTIMATE EARS MEGABOOM 3 Portable Bluetooth Speaker - Nightblack
Ultimate Ears Megaboom 3 review: A floating Bluetooth speaker with plenty of style
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Ultimate Ears UE Megaboom 3 Review
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Ultimate Ears UE Megaboom 3 Review
Ultimate Ears Megaboom 3 review: A floating Bluetooth speaker with plenty of style