"Upgrade your marine system with the DS18 Digital LED Ring for Marine and Powersports Speakers and Towers! With advanced digital LEDs, the Digital LED Ring from DS18 offers customizable lighting effects controlled with the DS18 LC-DRM Bluetooth module (not included). You can control the ring's colors and patterns to match your mood using DS18's LC app on iOS or Android. Built for marine life and crafted from high-quality and sealed acrylic, this LED ring stands up to salt, spray, and sun. Its .5"" speaker spacer ensures a perfect fit for your LED speaker ring between your speaker and the mounting surface. Marine-grade digital LED speaker rings Fits most DS18 NXL and CF-Series marine speakers Sealed acrylic construction Controlled by DS18 LC-DRM module (not included) Easy installation"