Display: 5 digits 16mm (0.6“) LCD Accuracy: ±(0.05% + 1 digit) Sampling Time: 0.5 sec (over 120 RPM) Range Select: Auto - Ranging Memory: Last value,Max. value,Min.value Power Consumption: Approx 50mA Test Range:2.5 to 99,999RPM(r/min) Resolution: 0.1RPM(2.5 to 999.9RPM) 1RPM(over 1,000RPM) Total Test Range:1~99,999 Power: 4x1.5V AA Size Battery or to external DC 6V Regulated power supply