Hello M.landolt
Thank you for your question. As already answered correctly, the Roomba i7 cleans even without a wifi connection. This is what the three buttons on the robot itself are for. CLEAN to start the cleaning, a HOME button so that it returns to the station and also a button for spot cleaning at a desired location on 1 m2. We hope we have been able to help you, otherwise feel free to contact us again.
Best regards,
Your iRobot Team