The Marine Guardian - Guardian Device Package w/Global 2G-3G-4G LTE Cellular 2-Way Iridium Satellite Messaging - Sensors Included [THE GUARDIAN P.C-S]Guardian Device Package with Global 2G 3G 4G LTE Cellular & 2 Way Iridium Satellite Messaging Sensors Included TMG 2. 0 supports 6 sensors and 4 outputs to control connected systems. This device has combined global cellular and 2 way Iridium satellite communication, allowing users to monitor and control connected devices anywhere, anytime. The power resides in its proprietary technology built for the harsh marine environment, the 2 way global Iridium