Naples has marine audio and TV electronics available for sale. These comprise audio systems, DVD players, television sets, subwoofers and amps, accessories and speakers. While they function similar to regular audio and video electronics, they are designed and built to withstand the rougher marine environment, which has rough waves, humid air, salt and other inclement weather. The circuit boards have to sealed within plastic to ensure they remain undamaged by water and corrosive action of humidity and salt. The materials used may be mylar or other times of plastics. A full enclosure system for the electronics can also be built for better protection. Some of the companies that manufacture specific models for marine use include JBL, Jensen, Boss, Poly-Planar, JVC, Sony, Kenwood, Aquatic AV, Infinity, Fusion, Pioneer, Kicker, Magnadyne, MTX, Clarion, DC Gold Audio etc. One or more of these are available in Naples.