Four mode functionality, including single vertical, single horizontal, horizontal/vertical combination and lock manual modes. The 360 coverage gives the user one setup point for an entire room. The GLL 2-20 range is 65 Ft. diameter with accuracy of 3/16 In. at 30 Ft. Smart Pendulum System features self- eveling function and indication for an out of level condition. Pendulum lock protects the unit for safe transport to the jobsite. The BM3 positioning device easily holds the laser and attaches to objects for precise positioning.