<p><strong>VICTRON ENERGY GSM100100100</strong>, is an accessory for GX devices, the GX GSM is part of the <a href="https://www.victronenergy.com/live/venus-os:start">GX product family</a><span>. It is a cellular modem for mobile internet for the system and connection to the&nbsp;</span><a href="https://vrm.victronenergy.com/landingpage">VRM portal</a>. The GX GSM requires a full-size SIM card, and connects to a Venus product with a 1-meter cable (included). An indoor antenna is included and an external antenna is available as an accessory (art.no GSM900200100). The GX GSM also has a built-in GPS receiver. For it to function, an active GSM antenna is required (accessory art.no GSM900100100).</p><p><br><strong>Good product-related links:</strong></p><ul><li><a href="https://www.victronenergy.se/accessories/gx-gsm" rel="noopener noreferrer" target="_blank">Manufacturer's product page</a></li><li><a href="https://www.victronenergy.com/live/venus-os:gx-gsm?_ga=2.51854765.568896989.1583138168-116688610.1579199517" rel="noopener noreferrer" target="_blank">Manual (pdf)</a></li><li><a href="https://youtu.be/645QrB7bmvY" rel="noopener noreferrer" target="_blank">Video Victron GX - Connecting online and setting up GX GSM</a></li></ul>