Detailed Product Description 1): 5-digit large LCD display, digit height is 18mm 2): Measuring range: 2,599,999 loops/min 3): Revolution: 0.1rpm (25,999,9rpm) 1rpm (1,000rpm) 4): Accuracy: ± (0.05%+1D) 5): Sampling time: 0.5s (120rpm) 6): Range selection: automatic selection (laser) 7): Effective distance: 50mm-500mm 8): Net weight: 132g