With the Iridium Go! Exec and PredictWind DataHub, you have everything you need for satellite communications on the high seas or wherever you travel away from land-based communications systems. The Exec communicates with satellites via its built-in antenna and connects with up to 5 smart phones as a wifi router. It can handle two voice calls simultaneously, connect you to the web, or automatically send a distress signal and your location. The DataHub works through the Exec and provides your location, speed, course and other voyage details. All you need is a sim card and usage plan through a satellite communications provider, such as PredictWind (which also offers excellent step-by-step set-up instructions and personalized assistance). Used on our passage from the USVI to Maine, it worked wonderfully; we don't need it anymore as we plan only coastal cruising. This is your opportunity for accessing the best in weather prediction and route planning offshore at a cost-savings. Includes 110V transformers to set up the system at home and power cables for 12V system connections. Protective cover forExec included also.