If you are looking for a wireless speaker with a long battery life, the Wonderboom 3 Grey could be something for you. The ultimate ears Wonderboom 3 are the new generation of compact speakers, now with 14 hours of battery life and made from recycled materials. IP67 certification. The ultimate ears Wonderboom 3 are equipped with an IP67 certificate, which means that it is dustproof within certain test conditions and is not intended for use in water, but is suitable for rain, for example. Beautiful 360-degree sound. The Wonderboom 3 contains powerful sound in a compact format. This way you can also enjoy your music outside, and you can easily expand the sound with another Wonder Tree 3 speaker, and with multiroom audio you can easily connect two speakers together.