The UE Megaboom 3 has what you want in a portable Bluetooth speaker: good sound quality, long battery life, ruggedness and more.
Logitech UE Megaboom 3 Bluetooth Speaker - Parallel Imported
UE Megaboom 3 review: UE Megaboom 3 is more durable, has better bass and a 'magic' button - CNET
UE Megaboom 3 review: UE Megaboom 3 is more durable, has better bass and a 'magic' button - CNET
Aussie Bluetooth Speaker Review: Ultimate Ears Megaboom 3 - Reckoner
UE Boom 3 and Megaboom 3: The Best Bluetooth Speaker Is Better
Ultimate Ears Megaboom 3 Reviewed • Audiostance
The Complete Comparison: JBL Charge 4 vs. Ultimate Ears Megaboom 3 –
UE Megaboom 3 Review – Is UE's latest speaker worth it?
UE Megaboom 3 review: UE Megaboom 3 is more durable, has better bass and a 'magic' button - CNET