3D Surround Sound: Three audio units deliver a surround sound experience that makes you feel like your favorite artist is standing right in front of you. 3D Detail: The Motion X500 features certified Hi-Res audio wirelessly. Three finishes: Luxury Black, Vibrant Pink, and Gloss Blue. Great Sound in a Portable Size: The Motion X500 portable Bluetooth speaker features 3D detail. Fully waterproof: thanks to an IPX7 rating.