Bosch GLL 3-80 P Line Laser -Laser generates one horizontal and two vertical 360° laser planes from one startup point -Use for simultaneous leveling and alignment, and squaring right angles -Smart Pendulum System self-levels and indicates out-of-level condition -One 360° horizontal plane and two vertical 360° planes from one point -For simultaneous leveling and alignment, and squaring right angles -Pendulum locks for safe transport -Four AAA batteries and carrying case