Yes, the Winbot W2 Omni can be used in an area not covered by WiFi, although certain functions are limited. Here are the key points:

- The robot can operate independently without a WiFi connection, using its sensors and built-in path planning technology to clean windows.
- However, some advanced features, such as control via the ECOVACS HOME app, notifications and software updates, will not be available without a WiFi connection.

You can therefore use the Winbot W2 Omni to clean windows even without WiFi, but you won't be able to take advantage of all the features offered by the application.