OUTDOOR BOOST: Outdoor Boost increases loudness with a single button press WATERPROOF AND DUST-PROOF: Perfect for outdoors, this speaker is waterproof and dustproof DOUBLE UP: You can pair two speakers to double up at the same time wirelessly for true wireless stereo CONTROL YOUR MUSIC: You can now Play, Pause, and Skip tracks directly on the speaker with the help of UE button on top BUNDLE INCLUDES: Ultimate Ears WONDERBOOM 2 Portable Waterproof Bluetooth Speaker (Radical Red) and Knox Gear Protective Case