HEMJEX Ultrasonic Distance Measure Laser Pointer Meter Features: -High accuracy measurement for distance, area, volume. -Ultrasonic apparatus that can measure the straight distance from 0.50m to 18m. -Using emit ultrasonic to object to being tested, then the ultrasonic time to determine from the distance is measured. -Ultrasonic apparatus is completely suitable for a family to decorate, buy air conditioning calculation area of volume. -The simple operation panel is more convenient and quick for using. -The large LCD screen makes your reading more convenient. -Perfect for determining ceiling heights, calculating the length of pipe, cable, or estimating materials such as paint, drywall, flooring, etc. Easy to Use: -Just press one button and the distance will instantly show up on the LCD display, and simply by pressing a few buttons, areas and volumes can be calculated. -Its blue backlit LCD display also makes it easy to read on the dimly lit or dark job sites.