This fast, simple leveling tool is a great value. NRL200 is
equipped with a high-performance compensator that offers speedy, accurate
leveling.
For indoor or outdoor leveling applications, just set up within a wide range of
+/- 5°, and the compensator takes over leveling, letting you get to work. There
is an out-of-leveling-range warning (audio) signal to prevent wrong
measurements. Indoor features include: wide sweep, narrow sweep (chalk line
generating), and dual beam squaring (standard) for both level and plummet.