Height Accuracy (Single Measurement): ±1/16in @ 100ft (2mm @30m) Magnification of Telescopic Sight: 20X Setting Accuracy of Compensator: 0.5 arcsec Shortest Target Distance: 2ft (0.65m) Graduation of Circle: 360° Operating Temperature Range: -4 to 122° F (-20 to 50° C) Compensator Type: Air-Damping Hilti PN: 428300 Package Includes: Tool, plumb bob, adjusting screws, and user manual in an impact-resistant plastic tool box