To manage several U7 Pro-Wall access points, it is not absolutely necessary but highly recommended to use a controller. Here are some options:

- UniFi Controller: The UniFi Controller, which is part of the UniFi OS, allows for centralised management and configuration of access points. This can be installed on a dedicated device such as the UniFi Dream Machine Pro or on another device with the UniFi software.

- Dream Machine Pro: The Ubiquiti Dream Machine Pro is an example of a device that can act as a controller. It offers comprehensive management and configuration of access points as well as other network functions.

Without a controller, the functions of the access points are limited and management becomes more complicated. With a controller, however, you can more easily configure, monitor and manage multiple APs, which is particularly useful when there are 4-5 APs in the house.