Mobile Expander Pro is a device that will expand Yacht Router Pro 4G Booster with three additional mobile network modems. If you want to avoid constant mobile SIM card changing while cruising in different areas this is the best solution for you. Moreover, it can be ordered in combination of modems dedicated to different mobile network bands to get worldwide coverage. Mobile Expander Pro is equipped with Mobile Network Bonding feature that will significantly increase upload and download data rate.