This JVC 4-channel amplifier is the durable and powerful product you need to give your system a much needed boost. This amplifier is certified waterproof, dustproof, rustproof, and vibrationproof. A Drain Tunnel Structure is employed for creating a gap between the amplifier and the installation surface. This prevents saltwater and sand from accumulating on the bottom, increasing corrosion protection. Thicker terminal connection points and increased wire size enables maximum current flow and higher output for better low frequency response and cleaner output, resulting in powerful bass reproduction. Magnetic Shielding for the output coils reduce radiated noise, delivering smooth and accurate sound. The Bluetooth antenna housed inside the remote control provides more sensible range for device connectivity, ensuring uninterrupted music playback.