I like the UE Wonderboom 4 Bluetooth speaker so much that I bought two of them, though I wish I could have paid less for them. Fortunately, you can stock up on the cheap, so long as you like the color blue. The Wonderboom 4 is available in blue at Amazon for $51.49, and at Walmart and Best Buy for $51.99 ($28 off its regular price). That’s the lowest price we’ve seen yet for the waterproof speaker, with most of the other color options selling at a slightly higher (but still discounted) $69.99.

Despite the Wonderboom 4’s compact size, the speaker sounds great, and is IP67-rated, meaning it can survive being submerged in water for a while. Although, its floatable design means that it’ll quickly return to the surface so you can put it back on dry land (it’s not meant to be listened to while in the water). If you have two of them, like me, they can be wirelessly paired together for stereo sound. With up to 14 hours of battery life per charge, the speaker will likely outlast your long summer outings.