1This distance finder adopted laser technology with precise induction, accurately and efficiently measures the distance. 2Large LCD with backlight, you can see clearly even in the dark. With automatic poweroff, saving energy and electricity. 3Ultrasonic range finder uses ultrasonic waves to be measured and then calculates the ultrasonic roundtrip time to determine the measurement distance. The level meter can be used to measure and calibrate the horizontal distance at the same time. 4It is suitable for construction, decoration, engineering and other places, and can achieve measurement that the traditional tape measure cannot. Ultrasonic range finder can measure straight line distance from 0.5~18m/6~59.1ft. 5Come with lanyard, compact size and portable design make it convenient to carry.