Functions:
1. Laser level can measure whether the plane is uneven or scratched, etc
2. Output laser vertical plane and horizontal point
3. There is a horizontal bead on the laser level, which can measure whether the horizontal plane is horizontal
4. There are led light beads on the laser level, even at night, you can see the water level beads
5. It is more practical and convenient to use laser level instrument with magnet adsorption function.