Ultimate Ears Wonderboom 4 blue sale: Save $48 on the best waterproof Bluetooth speaker under $55

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It is blue. It floats. And right now it costs almost half price.

The Ultimate Ears Wonderboom 4 portable speaker is down to $51.44 on Amazon as of July 16. That is a $48.55 discount off the $99.99 list price. For context, that price tag is terrifyingly close to the record low of $49.35 we ever saw. So yes. You can basically wait another day and hope it dips another buck or two. Or you can buy it now.

Most people want a speaker that doesn’t drown when the drink spills over the side. Or worse.

This little cylinder handles the drop. You can let it go from five feet. Concrete floor? It survives. IP67 waterproof rating? It floats. For up to 30 minutes it stays buoyant in a pool, lake, or bathtub disaster zone. When it emerges, it still works. It does not sputter. It does not die. It just plays.

“You can drop it from heights of up for five feet without worrying about destroying it.”

Sound quality often takes a backseat in this price range. Not here. The bass is surprisingly deep for a device small enough to slip into a tote bag. It gets loud. Loud enough for a backyard barbecue or a cramped dorm room. We listed it as the top pick for portable speakers under $100 because it refuses to sound tinny.

Battery life hits fourteen hours. That is enough time for a beach trip and the ride home. Maybe some dinner. No need to carry a charger if you move fast.

Why buy the Wonderboom 4 specifically? Durability meets price. Most rugged speakers cost twice as much. This one floats. That alone separates it from the plastic bricks that sink and short out the second they touch the water.

Don’t overthink it. The price is $51.44. It will go back up. Probably tomorrow. Probably immediately.