The JBL Flip speakers were already really good. Changes to the newest fourth-generation version make them even better.
JBL Flip 4 is the next generation portable Bluetooth speaker that delivers surprisingly powerful stereo sound. This compact speaker is powered by rechargeable Li-ion battery that offers many hours of continuous, high-quality audio playtime. Sporting durable, waterproof fabric materials, Flip 4 is the all purpose, all weather companion that takes the party everywhere. It also features a built-in noise and echo canceling speakerphone for crystal clear conference calls.
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JBL Flip 4 review: JBL Flip 4 Bluetooth speaker gets improved sound, full waterproofing - CNET
JBL Flip 4 Waterproof Portable Bluetooth Speaker
For JBL Flip 4 44x49mm Waterproof Replacement for genuine speakers
JBL Flip 4 Portable Waterproof Bluetooth Speaker (Factory Renewed, Black) : Electronics
JBL Flip 4 Bluetooth speaker gets improved sound, full waterproofing - CNET