Surprisingly clear 360º sound. With the Ultimate Ears Wonderboom 4, you'll experience music like never before. This compact party speaker delivers a surprisingly large 360° sound. So the sound comes from all corners of the speaker. Thanks to the 14-hour battery life, you can enjoy your favourite songs all day long. Whether you're indoors or outdoors, this wireless speaker provides an impressive sound experience. Perfect for outdoors and podcasts. With the unique outdoor boost and podcast mode, the Ultimate Ears Wonderboom 4 adapts to your environment. Press the outdoor boost button for full stereo sound outdoors or switch to podcast mode for clear and rich voices. These practical functions ensure that you can enjoy the sound quality in any situation. Water and dustproof. The Ultimate Ears Wonderboom 4 is designed to survive any adventure. With an IP67 rating, this speaker is waterproof, dustproof and floats. This makes it ideal for the pool, the beach or even the shower. You don't have to worry about water or dust damage. Twice the fun with DuoMode. Combine two Ultimate Ears Wonderboom 4 speakers for even more impressive sound. With DuoMode you can connect the speakers together and enjoy true wireless stereo sound with a left and right channel. This turns every party or event into something very special.