Best price ever: The Ultimate Ears Wonderboom 4 Bluetooth speaker is half off at Amazon

SAVE $48.55: As of June 1, the Ultimate Ears Wonderboom 4 Bluetooth speaker is on sale at Amazon for only $51.44. That's just shy of 50% off its list price and its lowest cost on record.

Mashable's shopping team's favorite Bluetooth speaker under $100 is now under $55. We've tested tons of Bluetooth speakers and the itty bitty Ultimate Ears Wonderboom 4 made quite the impression. If you're in the market for an ultra-portable speaker that's an absolute powerhouse, we highly recommend scooping it up while it's on sale.

As of June 1, the Wonderboom 4 in blue is down to just $51.44 at Amazon. That's nearly 50% off its list price of $99.99 and the best price on record according to the price-tracking tool camelcamelcamel.

When we say itty bitty, we aren't being dramatic. The Wonderboom 4 fits snugly in the palm of your hand, but is surprisingly powerful and balanced. There's even an outdoor boost button to crank things up a notch when the moment calls for it. "The sound profile is well-rounded and can get loud," Mashable's reviewer Bethany Allard writes, but adds that she wishes there was a companion app for more customization.

Still, for a no-frills speaker, it's an excellent value. It can last up to 14 hours per charge, handle drops from up to five feet without breaking a sweat, and be fully submerged in water for up to half an hour and still live to tell the tale. Whether you want something to take along on hikes, beach trips, pool days, or anything in between, it's a easy grab-and-go speaker that's a total powerhouse for its size and price — especially now at just over $50.