The 26" SoundExtreme SEB offers all the original features—now with a long-lasting lithium-ion battery for easy, wire-free installation. Perfect for ATVs, UTVs, boats, and golf carts, it’s 100% waterproof, dustproof, and dirtproof. With 500 watts powering 8 marine-grade speakers, plus EcoCast to link up to 50 units, you get powerful sound anywhere you go.