Usually your Philips robot will be able to detect the stairs and avoid them, but in some cases it might not detect them. Therefore, we recommend you to avoid using the robot next to staircases unless you are able to monitor it.
Your Philips robot is fitted with three drop-off sensors at the bottom (image below). These drop-off sensors are used to detect and avoid height differences.
Note: To ensure proper detection of stairs, steps or other height differences, clean the sensors in the bottom of the robot regularly.