... beam Green beam Rotary Laser level 500m range Leveling AccuracyHorizontal: ±20" Vertical: ±20"Leveling Range±5°Measuring RangeDiameter:500m (Using the laser ... .p.mDirectional-Scanning Angle0°,10°,45°, 90°, 180°Slope-adjusting Range±5° (Bi-directional )Light SourceLaser Diode, wavelength: 635nmDown Point Diode ...