The TP-LINK 3G/4G Wireless N Router TL-MR3420 allows you to quickly set up a 300 Mbps Wi-Fi network and provide a 3G/4G internet connection. By connecting an LTE/HSUPA/HSDPA/UMTS/EVDO USB adapter to the router, you create a Wi-Fi hotspot that enables the use of a 3G or 4G connection wherever such network coverage exists. Whether on a train, camping, or in rural projects, you will have a reliable internet connection available everywhere. Few things are more frustrating than losing your internet connection while working. To avoid such interruptions and provide a stable connection, the TL-MR3420 is the solution: a robust 3G/4G Wi-Fi N router with a true 3G/4G/WAN backup strategy. A primary connection can be set: 3G/4G or WAN (xDSL/Cable). The TL-MR3420 will then automatically switch to the secondary connection as soon as the first one is interrupted. Once the primary connection is available again, it will automatically revert to that connection.