Professional 360-degree horizontal cross-line laser delivers 4-mode functionality, including single vertical, single horizontal, horizontal/vertical combination and lock/manual modes. The 360-degree coverage gives the user one setup point for an entire room. Range is 50 ft. Dia with accuracy of 5/16 In. at 50 Ft. Smart Pendulum System features self-leveling function and indication for an out-of-level condition. Pendulum lock protects the unit for safe transport to the jobsite. 1/4 In. - 20 mount threading allows laser to be mounted on tripod for precise positioning. Includes 4 AA batteries.