The Bosch Gll 2 Self-Leveling Cross-Line Laser Is A Compact Leveling And Alignment Solution. It Features The Smart Pendulum System, Which Self-Levels And Indicates Out-Of-Level Position. The System Offers A Switch Slider To Lock For Secure Transport. Easy-To-Use One-Button Operation Allows The User To Choose Among Cross-Line, Horizontal Or Vertical Modes, Depending On The Application. The Unit Includes A Flexible Mounting Device That Can Clamp To Practically Any Interior Surface For Maximum Versatility. The Manual Mode Allows The User To Lock The Cross-Line, So The Operator Can Lock The Line And Set The Level At Any Desired Angle.