Operation
1.Switch-on
Short press to switch on the equipment,and laser point is opened at the same time.indication as shown as figure A. Laser point is automatically shut down if no any operation after 30seconds.Or short press to close the laser point, indication as shown as figure B. Short press again to open laser point, indication as shown as figure A .
2.Change Measurement Reference
Default measuring reference is the bottom of meter,indication as shown as figure A . Long press to change the measuring reference to the top of meter,indication as shown as figure C.
3. Unit Conversion
Factory default that unit is m, indication as shown as figure A. Long press to switch unit m to Ft, indication as shown as figure D. Long press again to switch the unit Ft to In, indication as shown as figure E. (Note: Long press to switch the unit of measurement will switch the value at the same time if it has value of measurement.)
When the unit of measurement is m², long press to switch the unit to ft²,long press again to switch the unit to In².When the unit of measurement is m³,long-time press to switch the unit to ft³,long press again to switch the unit to In³.
4.Change Measurement Mode
Default setting of measurement is single measurement mode, indication as shown as figure A. Short press to switch area measurement mode, indication as shown as figure F.Short press 
again to switch volume measurement mode, indication as shown as figure G . Short press again to switch pythagoras measurement mode to measuring height, indication as shown as figure H. Short press again to switch Height Difference pythagoras measurement mode ,indication as shown as figure I. Short press again to switch Historical Data Review mode,indication as shown as figure J.

5. Switch off
 The equipment can be switched off at any time by long time press .
6. Historical Data Scroll up Check/Data Clear
In Historical Data Review mode ,measuring data indication as shown as figure K. Short press or Short press to the historical reading one by one forward .Bigger number means the newer measuring value, indication as shown as figure L.
Short press ,delete measuring data records one by one forward.(Note:The equipment can store the most recent 20
measuring data. At this time, it will measure data storage records that factory tested. It not means this equipment has been used.)

7. Single measurement of distance between two points
In the single measurement mode, aim the laser onto target Short press . The result willbe displayed immediately as shown as figure M.

8. Continuous measurement of distance between two Points
In the state of switch-on, long press to enter the continuous measurement mode, indication as shown as figure O.

9. Area Measurement
In the area measurement mode and aim the laser onto target.Short press to measure the two side lengths of the target respectively,area measurement results will be displayed as shown as figure P.

10. Volume Measurement
In the volume measurement mode and aim the laser onto target. Short press and measure the three side lengths of the target  respectively. The result will be displayed immediately as shown as figure Q.

11. Plus and Minus Functions
When the equipment is switched on, indication as shown as figure A . Short press
 , the current measurement result is added to the previous one and the indication as shown as figure R .Short-time press , the current measurement result is subtracted from the previous one, as shown in figure S .(Note: The default previous measurement value is 0.000m)

When measuring area and volume, short-time press or , the current measurement result is added to or subtracted from the previous  one also.
12. Height Measurement(Pythagorean Theorem)
In the Height Measurement (Pythagorean Theorem) mode,the meter is in the horizontal position and aim the laser onto the bottom of the target . Short press to measure the right-angle side length of the triangle.Then keep the reference point of the meter unchanged and aim the laser onto the top of the target .Short press again to measure the length of the hypotenuse of a right triangle. The height value of the right triangle is displayed immediately on the screen as shown as figure T.

13. Mute Mode
When the equipment is switched on ,the default setting of buzzer is switched on. The equipment will beep when measuring . Long press , hear “beep”, the mute mode switch on, the equipment will not beep when measuring .
14.Height Difference Measurement(Pythagorean Theorem)
In the height difference measurement(Pythagorean Theorem) mode,the meter is in the horizontal position and aim the laser onto the datum of the target. Short-time press to measure the right-angle side length of the triangle.Then keep the reference point of the meter unchanged and aim the laser onto the bottom of the target . Short-time press again to measure the second length of the hypotenuse of a right triangle.Then keep the reference point of the meter unchanged and aim the laser onto the top of the target .Short-time press again to measure the first length of the hypotenuse of a right triangle.The height value of the right triangle is displayed immediately on the screen as shown as figure U

Notes
All the pictures used in the manual are only illustrative illustrations, not the actual display of the equipment.