With two vials, for both vertical and horizontal measurements Laser level line

Specifications:

With two vials, for both vertical and horizontal measurements2 lines with 90 degree angle Laser sources: two 635nm laser diodeLaser safety class: class II, less than 1mWOperated by DC 3V (2*LR03 AAA batteries, not included)

Laser level line,With two vials, for both vertical and horizontal measurements