David White's 5" digital theodolite with laser plummet is an economical instrument used for aligning, as well as for plumb and turn angles. Simple functions activated by push buttons provide the user accurate LCD digital readings. This is David White's best theodolite. Features: Incremental encoding detection system with dual digital displays Automatic power shut-off Laser plummet for centering of point Coaxial tangent and clamp screws provide ease of use in sighting and alignment Built-in battery pack can be attached and detached by a single action Water resistant, sealed construction