A marine head unit that can do it all! Compact, powerful, beautiful, and will stand up to the rigorous punishment that all marine and off-road head unit go through.This powerful receiver features all the functions you need like BT, RCA outputs including subwoofer, USB linking and ...A marine head unit that can do it all! Compact, powerful, beautiful, and will stand up to the rigorous punishment that all marine and off-road head unit go through.This powerful receiver features all the functions you need like BT, RCA outputs including subwoofer, USB linking and charging with remaining waterproof! This is the key to enjoying loud music with the highest quality for your boat, atv, or any vehicle that may see the water frequently.The MRX1 is DS18's NEW all in one marine head unit that does it all!