An Ultrasonic Distance Meter is a device that measures distance using ultrasonic waves. It emits sound waves at a frequency higher than humans can hear, which bounce off an object and return to the meter. By calculating the time it takes for the sound waves to travel to the object and back, the device can determine the distance accurately. These meters are commonly used in various applications, including construction, surveying, and interior design. They provide a quick and efficient way to measure distances without the need for physical measuring tools like tapes or rulers.