The UE Roll wireless speaker from Ultimate Ears is only about the size of a small stack of CDs, but it’s designed to deliver much bigger performance. The disc-shaped device is fashioned as a portable companion for outdoor adventures, even if that means getting wet. The UE Roll is IPX7-rated, which means it can be immersed in liquid up to 1 meter for up to 30 minutes. The speaker includes a bungee cord for attaching to your clothes or gear, comes in a variety of colors and costs $100.