JBL JAM5000N Marine Head Unit With Color LCD Display - 2.8"JBL JAM5000N is entry level+ marine stereo designed to withstand marine environment JBL JAM5000N is our entry level+ marine audio source units designed for multi element environments & engineered to meet the demands of extreme environments while satisfying the performance requirements for marine audio consumers in this price range. The design is meant to integrate seamlessly into any boat design with an elegant and brand specific look and feel.