360 Green Laser Source 3 Projecting Modes: 360 Horizontal beam easily projects a line covering the wall and ceiling. Projects bright horizontal, vertical cross ?lines onto flat surfaces, 3 modes of laser line can be switched independently; Green laser is 3 times brighter than red laser with the same light source and gives you maximum green laser brightness up to 100 ft with high accuracy Multipurpose Wide Application: PREXISO line laser can cover the room's surrounding floors, walls, and ceilings. The horizontal and vertical lines intersect at an angle of 90 to help you quickly visualize and complete the square layout; Applicable for floor and wall tiling, chandelier, spotlight installation, hanging wall draws, air condition installation, door window calibration, building structure measurement; Class II laser product, maximum laser output 1mW Self-Leveling Manual Mode: With the switch to the "UNLOCK" side, the tool is in self-leveling mode, which means the tool will level itself if it is within 4 of horizontal. If the surface tilts more than 4 degrees, the laser will blink as an alarm; Slide the switch to "LOCK" side and press the button 3sec to turn on the laser in manual mode, the self-leveling feature is disabled, and lock lines for alignment to any angles Bonus Laser Level Tripod: The Tripod can expand to 37-1/2 inch helping you adjust the position of the laser for maximum accuracy. It closed height of 17 inch, easy to store; Combined with a standard 1/4" quick-release plate, you can install and remove the laser level in seconds Bonus Target Plate Green Glasses: The arm length of the adjustable frame glasses is adjustable for 4 modes by about 3/4 inch. The side and nose pieces fit perfectly by adjusting the length of the arm. You don't need to take off myopia or farsighted glasses, you can directly wear the glasses outside. It can increase the visibility of the green laser line or the green laser point to some extent. TIPS: Laser glasses can only for better visibility, not protection