Lytool Laser Measure Digital Tape Measure Laser Measurement Tool Distance Meter(165Ft M/In/Ft), Built-In Dual-Axis Bubble Level, Backlit LCD

Buttons and Their Functions: 1. "MEAS" key: Open (long press), measure (short press), open continuous measurement mode (long press) 2. "Cuboid pattern" (above "+") key: Press once to measure area, press twice to measure volume 3. "Triangle pattern" (above "-") button: Pythagorean measurement 4. "+" key: Addition operation 5. The button directly below "MEAS": Save 6. "-" key: Subtraction operation 7. The button directly below the "+": Select the measurement reference (front point, tripod measurement reference or back point, the default is the back point reference.) 8. "OFF CLEAR" key: Power off (long press), clear (short press) 9. "UNIT" key: Sound off (short press), unit(M / Ft / In) conversion (long press) Storage Function: The device can automatically save 20 sets of measurements or calculations. Press the save key to view the last 20 measured or calculated data, and the stored records can be displayed by pressing the (+) or (-) key. Continuous Measurement Mode and Maximum and Minimum Measurement: Long press “MEAS” key to enter the continuous measurement mode.Then,the main display line will show the real-time measurement result data,and the auxiliary display area displays the maximum and minimum measurement values during the measurement. While in the continuous measurement mode, short press the “MEAS” or “OFF CLEAR" key to stop the continuous measurement mode.The continuous measurement function will automatically stop after measuring 100 times. Precautions: 1. This product is a Class 2 laser instrument, the laser type is 630-640nm, and the laser power P 2. Strong sunlight will weaken the laser energy, and will affect the accuracy and measurement range. And it isn't suitable for the measurement of water and glass surface, because the laser can easily pass through them