Acculine Pro 40-6520 Laser Level w/ Detector 40-6770. Acculine Pro 40-6520 Laser Level w/Detector. ACCULINE PRO 40-6520 FEATURES. Self-leveling horizontal plane and plumb-up beam. Manual-leveling vertical plane and horizontal beam. Audible warning when beyond self-leveling range. Range scan provides two chalk line widths and single point plus electronic rotation option. Three rotating speeds of 300, 600, and 900 rpm. Includes adaptor for manual vertical leveling. Fully enclosed rotary for protection and durability. Quickly and accurately locates any laser signal emitted from rotary or “pulsed beam” line-generating laser levels. Audible and visual indicators for precise leveling. Range = 393.7 ft. I have represented this item to the best of my knowledge.