... Transfer, Construction, Area (Plan & Surface), Volume Calculation, Tie Distance (MLM), Remote Height, Hidden Point, Offset, Reference Line, Reference Arc, Reference Plane ... Round prism GPR1 3’500 mRange Reflective tape (60 mm x 60 mm) 250 mAccuracy / Measurement time(Standard deviation ISO-17123 ... At 30 m: approx. 7 mm x 10 mm, At 50 m: approx. 8 mm x 20 mmExtended Internal memory Max.: 100’000 ...