1、This laser line level displays accurately horizontal and vertical illuminated line on a surface 2、AK435 at horizontal and vertical cross lines adding a highlight point 3、Increased highlight point suits for brighter construction site, even in outdoors, increased highlight point were visible 4、Use 2 Line 1 Point principles, can draw horizontal line and vertical line, easy to use 5、Laser line level can be used wherever accurate verticals and horizontals are required, typically in the construction and cabinetry industries Features: This laser line level displays accurately horizontal and vertical illuminated line on a surface. AK435 at horizontal and vertical cross lines adding a highlight point. Increased highlight point suits for brighter construction site, even in outdoors, increased highlight point were visible. Use 2 Line 1 Point principles, can draw horizontal line and vertical line, easy to use. Laser line level can be used wherever accurate verticals and horizontals are required, typically in the construction and cabinetry industries. Specifications: Light Source: 5mw semiconductor laser Wavelength Line: 635nm Linear Accuracy: ± 2.5 / 5M Brake Way: Reluctance moving Width: <2.5mm / 5M Temperature: -5 ℃~45 ℃ Size: 98*92*128mm / 3.85*3.62*5.03" Battery: 2 AA batteries（Not included) Alarm: buzzer long ring Package Includes: 1 x Laser Line Level(Batteries are NOT included)