The U-LTE-Pro is a Category 4 LTE device that seamlessly integrates with the UniFi Dream Machine (UDM) or UniFi Security Gateway (USG) to deploy an LTE WAN failover network. The UniFi LTE uses the AT&T LTE network to provide backup internet connectivity in case your primary WAN connection goes down. For failover, the UniFi LTE provides a secondary Gigabit Ethernet port for bridging and passive PoE passthrough. This model works in the EU region and supports European LTE and WCDMA bands.