Hello @kimsungmin;
You hunt the World's First Bilateral Leaser Measurement Device, its Awesome.√
Now we can measure all the distances of a space by just standing at one point.

PROS:-

• First thing that is the World's first bilateral measurement gadget, you can measure both left & right side simultaneously or can measure a single direction.
• Super easy and comfortable to use. You can reach the tight spaces with the laser light where the measuring tape can't get through.
• All the measuring work can be done in seconds with the help of VH- 80.
• Pythagorean Theorem Mode comes in handy for measuring the third side of a triangle by measuring the two sides.
• All the measuring data you can send quickly on your smartphone app.
  CONS:-
• NOTHING.