The STANLEY STHT77342 SPL3 3-Spot Laser Level has the ability to project 3 beams - Up, Down and Horizontal. These 3 bright, self leveling beams provide accurate, plumb and horizontal point transfer. The Down beam with raised clearance provides dot visibility and alignment for wall track layout. Range 100'/Accuracy +/-1/8". This accurate performance supports common pro and tradesman applications. The QuickLink bracket and mounting system has a versatile bracket that links into multiple product mounting slots and 1/4" thread which clamps on to multiple surfaces. It has a locking pendulum to help prevent damage to internal components and also has over-molded grips for comfort and control. Uses (2) AA batteries, included.