Add an external speaker to any wired handset in your RS90 modular VHF system. One speaker can be added for each connected handset. An external speaker enhances volume, makes it easy for multiple crew members to listen in on radio or intercom calls and improves the reach of vessel wide announcements. Stay aware with the RS90 speaker – Adding an external speaker to your RS90 modular VHF system enhances volume when listening to radio calls or intercom messages, makes it easier for multiple crew members to listen in from the same station and improves the reach of vessel wide announcements broadcast over the system. Expand your RS90 system – The RS90 speaker is rated IPX7 water-proof and designed to match the low profile design of Simrad glass bridge displays and instruments. Up to four external speakers can be installed as part of an RS90 system, one paired with each HS90 wired handset. It’s easy to control speaker volume and switch the speaker on or off, from its corresponding handset. A modular system to fit any boat – The RS90 is a modular VHF system that’s expandable and customizable to suit any boat and any on-water communication needs. A single RS90 system can run up to six separate stations – four wired and two wireless. Multiple stations can be used as a vessel wide intercom system, keeping crew members in contact wherever they are on board.