The Best Just Got Better and Louder! SSV Works’ iPod Weather Proof audio system for the Polaris RZR XP 1000 and 2015 RZR 900 provides Hi-Def stereo sound. The SSV-WP3-RZ3O4A clamps in overhead to your stock cage, and installs in 15 minutes with a simple 2 wire hook up and is totally weather proof. Like all SSV Works systems, the enclosure is constructed of fiberglass for maximum durability and the best sound quality.