- The machine confirms the safety of its surrounding area with several sensors. The machine detects obstacles in a range of about 200 yards in front of it; do not go near the machine within the range that is not detectable by the sensors (behind, etc). It may not be able to detect the user as an obstacle.
- Low obstacles less than 10 cm (4 inches) in height from the floor cannot be avoided with sensor detection; remove them from the cleaning route beforehand.