N300 High Power Easy-N-Range Extender

I purchased half a dozen of these units to create a wireless cloud between three adjacent buildings. The courtyard doors are 97 feet from one another in direct line of sight, the repeaters were connected via extension cords (for testing) and laid in front of the open doors. They could not see one another. Within the same office environment, two were tested with TP-Link and Tenda routers. Both continually lost signal and dropped off within 40 feet of the router unobstructed. The circuitry was designed with plans for internal or external antennas. They should have implemented the external ones.