TASI-8740 Non-contact Tachometer 2.5 ~ 99999RPM range Optical Tachometer motor motor laser speed tester Product Specifications Measuring range 2.5 RPM to 99999 RPM Accuracy (0.05% + 1digits) Resolution 2.5 to 999.9rpm: 0.1rpm; 1000 to 99999rpm: 1rpm Sampling rate 2.0times / second (more than 120 revolutions) Effective measured range 50 to 500mm Ground mass Quartz crystal Manual / Automatic measurement Laser adjustable brightness MAX / MIN / AVG reading Data storage capacity 50 Data hold function Low battery indication Display 5 digit LCD display with maximum reading of 99999 Power 2 * 1.5V AAA alkaline batteries (NOT INCLUDED) LCD size 35 * 32mm Dimensions 108 * 60 * 32mm Weight Approx.70g (no battery) Package Content Photoelectric Tachometer, Instruction, warranty card Package manner Paper box