Poly Planar MRR2 is a wireless remote control designed for use with Poly Planar marine systems. It features a floating, waterproof design, and a usage range of 15 feet. The remote allows you to control various functions of your marine system, including power, volume, source, and audio adjustments. You can also use the remote to select radio stations, and to control CD playback. The remote includes six preset buttons, which you can use to store your favorite radio stations.