NEXUS WSI Box Wireless Server Interface Garmin gWind WSI-box - PERFECT! WARRANTYNEXUS WSI Box Wireless Server Interface Garmin gWind WSI box PERFECT! WARRANTY Works perfectly, fully tested with guarantee. Very rare unit. ***** The Wireless Server Interface (WSI) Connection Box forms the core of the NX instrumentation system; the central point at which all the data collected from the transducers is processed and then sent down a single cable to the Sea Data and, if installed, Wind Instrument displays. Among its many functions, the