The TP-LINK 3G/4G Wireless N Router TL-MR3420 allows for the quick setup of a 300 Mbps Wi-Fi network and provides a 3G/4G internet connection. By connecting an LTE/HSUPA/HSDPA/UMTS/EVDO USB adapter, a Wi-Fi hotspot is created, enabling the use of a 3G or 4G connection wherever there is network coverage. Whether on a train, camping, or in rural projects, a reliable internet connection is always available. Few things are more frustrating than losing internet connectivity 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 up—either 3G/4G or WAN (xDSL/Cable). The TL-MR3420 will then automatically switch to the secondary connection as soon as the primary one is interrupted. Once the primary connection is available again, it will automatically revert to that.