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SAVE $30:The museum of eroticismUltimate Ears Wonderboom 4 speaker is on sale at Amazon for $69.99, down from the usual $99.99. That's a 30% discount.

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Opens in a new window Credit: Ultimate Ears Ultimate Ears Wonderboom 4 $69.99 at Amazon
$99.99 Save $30

Your summer Bluetooth speaker comes with a checklist of requirements. If it doesn't tick all the boxes (or at least most of them), it's not worth coming along on your adventures. If you struggled through last summer without a solid portable speaker, Amazon has a nice deal in store today.

As of Feb. 18, the Ultimate Ears Wonderboom 4 speaker is on sale for $69.99, down from the standard price of $99.99. That's a 30% discount that saves you $30.

On the list of Mashable's favorite portable Bluetooth speakers, the Ultimate Ears Wonderboom 4 earns the top spot as the best option under $100.

For long summer days, the Wonderboom 4 is a great companion thanks to its long battery life that can last for up to 14 hours. Its small and compact design with attached strap means it's a breeze to toss it into your backpack or your beach bag.

SEE ALSO: Oru's lightest foldable kayak is worth every penny

Like all good beach speakers, the Wonderboom 4 is dirt-resistant and waterproof, but it can also float. The speaker can handle being submerged in water for up to 30 minutes which is nice reassurance that a few splashes by the pool won't cause any harm.

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The Wonderboom 4 was also drop tested from five feet which means the speaker will do just fine should it fall off a counter. Speaking of measurements, the Wonderboom 4 has a sound range of about 131 feet so you'll be able to hear it from anywhere in the backyard.

Before that first epic day of spring warmth comes around, get prepared by snagging the Ultimate Ears Wonderboom 4 speaker for 30% off at Amazon. No backyard barbecue or beach trip has ever regretted bringing along tunes for great vibes.

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