Here is our full step by step setup for a building-to-building line of sight 5Ghz WiFi link using two TP-Link CPE710 devices. This is for a customer who has multiple units in a small industrial area. One of the units is currently using a 4g router but cannot currently access resources on their main unit network and it's not a very stable or high-speed connection currently. This solution is inexpensive and will link both units to the same network allowing them to have a single network across multiple locations. You can find the CPE710 device here: https://amzn.to/3Td6drp