Self-leveling Mode & Manual Mode - Cross line laser with slide switch that allows you to set 2 modes. When working in self-leveling mode, the leveling compensation range is 4°±1°, and self-leveling is allowed when the tilt is less than 4 degrees. Manual mode, the self-leveling function is turned off, and the cross lock can be used at any angle. More Accurate & Easy to Use - Updated green laser beam, easy to adjust the reticle laser, is more accurate and stable than other common devices; In addition, it has higher brightness and lower power consumption. 1M Anti-Collision Laser Level & Hands-Free Working - IP54 rated shockproof housing provides 1M anti-collision, ideal for working on construction sites. Can also be attached to using a magnetic swivel mount (not included) or use threads for a 1/4" tripod mount (not included). Allows for hands-free work. High Visibility & Accurate Green Line Laser - Powerful reticle laser, with clear and distinct laser lines, can easily project bright red crosshairs over a wide angle to facilitate your leveling work. Horizontal line accuracy: 2.5mm. Vertical line accuracy: 2.5mm; Self-leveling tilt: 110 degrees.