We have added ultrasonic sensors on the sides and front of the machine. When the ultrasonic function is enabled, the machine will detect obstacles at a distance of 30-90cm, and the machine will light up yellow. If an obstacle is within 30cm of the machine, the machine will light up red, and the cutting blades will stop working. A prompt will be displayed on the remote control. To clear this state, you need to maneuver the machine away from the obstacle, then restart the cutting blades.