SPEAKER RINGS - made to be installed between the speaker and mounting surface. 2 control modes: Bluetooth APP control - BLEDIM, RF Remote control WATERPROOF - These rings are sealed for marine use if installed correctly. Perfect to be mounted on speaker boats, car speakers, and other Powersports speakers. SIZE & COMPATIBILITY - These LED rings are made for 10-inch Universal speakers and are pre-drilled and ready to install. This We also sell different size: 6.5inch,8inch,10inch,12inch,15inch,6*9inch,pls click our store to view. SPEAKER RINGS - made to be installed between the speaker and mounting surface.