DIMENSIONS: 73x37x17.5MM; WEIGHT: 31G; MEASURING RANGE: 0.05-99.9M; MEASUREMENT ACCURACY: ±0.5%; BATTERY CAPACITY: 200 MAH; UNIT SELECTION: CM-FT-IN; FOR MEASURING DISTANCES ON CURVED PLANES AND NON-RECTILINEAR SECTIONS, ALLOWS THE MEASUREMENT OF CURVED LINES, CURVES