Operating Range (In all Directions): 2in to 4ft 5in (5cm - 1.34m) Accuracy (Tool Positioning): Average Conditions: ±0.32" (8mm) for every 7.87" (20cm) thickness p to 3.28' (1m) Ideal Conditions: ± 0.08"(2mm) for every 7.87" (20cm) thickness up to 3.28' (1m) (w/o metal influence) Accuracy may be significantly reduced by irregular positioned rebar, welded reinforcing mesh, sheet metal, or other metal objects close to the tool. Please refer to the operating instructions for a detailed list of technical data. Wall Thickness (Average Conditions): up to 4ft 5in (±5% of thickness) Slope Adapter: ±2° Operating Temperature: -4 to 131° F (-10 to 55° C) Protection Class: IP 56 as per IEC 60529 Battery Type: 9 V alkaline Operating Time: 17h Hilti PN: 273123 Package Includes: Tool, receiver, (2) hand straps, PUA 91 adhesive putty, PUA 92 adhesive strips, (2) 9V alkaline batteries, and operating instructions in an impact-resistant plastic tool box