Check the listing for details. David White LR 520HV Construction Rotary Laser Level. Condition: Used. Listed at 666.54 USD. HI-POWER ROTARY LASER WITH LAYOUT BEAMS The David White LR 520HV is a hi-powered rotary laser for general purpose construction. Vertical alignment capabilities and squaring assists to ensure that walls or partitions are precisely aligned.FEATURES: Electronic self-leveling in both horizontal and vertical for fast and accurate setup Self leveling range up to +/- 5° that can sense and indicate out-of-level conditions Dual-axis manual slope allows grade matching for basic slope work between -10% to +10% in both X and Y axis Smart H.I. Alert System alerts user when laser has been moved Multiple scan angles, beam positioning, and variable rotation speeds, scanning for flexibility in various conditions and applications on the job site APPLICATIONS: Interior & exterior, light to medium commercial, residential construction Leveling, checking elevations, concrete forms, footings, foundations Basic slope work, driveways, ramps Leveling and aligning of walls Installation of ceilings and floors