https://www.gobilda.com/laser-distance-sensor-1m-range-3-3-5v-digital-or-analog-output/

The Laser Distance Sensor helps your robot to know the approximate distance between itself and an object. It operates by firing a laser, then measuring the time it takes for the laser light to be reflected off the object and back to the sensor. This allows it to sense the distance at ranges of up to 1 meter—depending on the reflectivity of the object’s surface.