1Accurately measure the vertical distance from a point to a certain surface with ultrasonic 2The internal temperature is automatically compensated and the measurement distance is not affected by the environment temperature 3The laser can be used to guide the measurement for more accurate measurement 4With automatic shutdown function 5It can be used to measure the length, width and height of a house, which is very convenient and practical. Suitable for construction, decoration, engineering, etc. Press the button, the instrument can emit ultrasonic, when it encounters an obstruction, it gives feedback, then the instrument can display the actual distance. Features: 1. Accurately measure the vertical distance from a point to a certain surface with ultrasonic. 2. The internal temperature is automatically compensated and the measurement distance is not affected by the environment temperature. 3. The laser can be used to guide the measurement for more accurate measurement. 4. With automatic shutdown function. 5. It can be used to measure the length, width and height of a house, which is very convenient and practical. Suitable for construction, decoration, engineering, etc. 6. Made of high quality ultrasonic sensors