1、The line is 2mm thin and visible at 50 meters, meeting the needs of different working occasion 2、Laser line level possess lightweight and portable, come with wide application range 3、Vertical and horizontal double blisters to ensure the accuracy and stability of the measurement 4、Suitable for being used in door and window installation, wall decoration, floor paving, wall construction, ceiling and countertop installation 5、The laser wavelength is 635nm(±10nm), the output is less than or equal to 1mW, the laser beam color is red, easy to observe Item Type: Laser Line Level Material: ABS Laser Beam Color: Red Laser Wavelength: 635nm ±10nm Laser Output: <=1mW Scope of Application: Door and window installation, wall decoration, floor paving, wall construction, ceiling and countertop installation Batteries: 3 x LR44 button batteries(not include) Line Width: Approx. 2mm / 0.08in Visible Range: Approx. 50meter / 164ft 1 x Laser Line Level