The USG Ubiquiti UniFi Security Gateway, is an enterprise Gateway router with Gigabit Ethernet that combines advanced security features with high performance routing technology in a compact and cost-effective unit. USG is wall-mountable with a dual-core, 500 MHz processor for standard hardware-accelerated performance

This has been reset back to the original firmware.  Will need to be updated to work with your unifi system. Latest firmware avaialble from unifi.