The UE Megaboom sounds really good, plays loudly and has long battery life. At $300, the Megaboom is pricey, but it delivers a lot for your money. The rugged design is IPX7-rated, which means it can be submerged in 1 meter of water for 30 minutes. It’s about the size of a 22-ounce beer bottle, so it fits pretty easily in a beach bag. There’s a speakerphone function, and UE claims a 100-foot range for the Bluetooth connection. Its app lets you pair two Megabooms for stereo sound or for sound in two adjacent rooms. It has a big, clear, full, loud sound (but at full blast it can distort voices a little). The battery is rated for 20 hours of playback time, though in our tests it lasted up to 30 hours.