It is not a big deal unless you are in salt water. alot of times they just coat the circut board and call it a marine head unit. This Head unit also has a wired remote that you can install on your transom. I have not had a problem and the person at my boat shop who does the stero install puts these in all the boats such as centurion,Nautique,montery etc. He builds usually 3-5 systems every 2 weaks and always uses this head unit. No complaints from any of his customers
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