Old 11-09-2011, 12:19 PM
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Join Date: Mar 2003
Location: Port Isabel, TX
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I installed it on my HDS5M. The zoom in and out buttons are the volume. enter mutes. The sound is good (I think).

If you order it, be sure to get the NMEA2000 Starter kit, if your boat does not have NMEA2000 already.