Phubbing / sensor

When the users put ultrasonic sensors into mobile phone headset hole, the ultrasonic sensors can through the way of launch ultrasonic wave and receive feedback to measure whether there is obstacles on front of users. Once on the front of users have a obstacles, sensors will timely reaction by the way of vibrating and flashing lights to remind the users be cautious.
At the same time of using sensors, does not affect the users to use headphones, because there have a headphone hole in the upper part of the sensor that can insert the headset.