Precision: ± 1 µm. Flatness: 0.3 μm/.000012”. Parallelism: 1 µm for model up to 50 mm 2 µm for model up to 100 mm 3 µm for model up to 175 mm 4 µm for model up to 275 mm 5 µm for model from 300 mm. Measuring surface: carbide, rectified, finely lapped. Battery life of about 2 years for models up to 100 mm; about 1 year for models over 100 mm. ORIGIN up to 100 mm: Yes. ZERO/ABS change: Yes. 2 x PRESET above 100 mm: Yes. Auto shutdown (after 20 min. without use). Yes. Key locking: Yes. Data management: Yes. Digital. Metric unit of measurement. Dimensions: L: 0 mm; a: 6.5 mm; b: 25 mm; c: 2.5 mm.