The gateway pro has a built in GSM/3G module with external slot for SIM card and back-up battery. ZigBoat is an innovative ZigBee/Wi-Fi wireless system for monitoring and interacting with your boat either remotely or while on board ensuring safety and peace of mind with no monthly fees or subscription. The ZigBoat consists of a core module (gateway) and a series of standard sensors that can be added to your specific needs. Thanks to ZigBee and Wi-Fi wireless technologies, which have direct communication with onboard sensors without the need for a cloud, ZigBoat sends real time push notifications when critical events occur. Using the ZigBoat app, you can check boat information that is being monitored by the system. With the optional 3G USB dongle (cod. ZB210), you can receive also SMS notification in case of a critical event occurs.