Measuring Range: 2.5~99,999RPM Resolution: 0.1 RPM (2.5 to 999.9 RPM); 1 RPM (over 1,000 RPM)

5 digits 18mm (0.6") White backlight LCDAccuracy: ±(0.05%+1 digit)Sampling Time: 0.5sec(over 120RPM)Range Select: Auto-RangingMemory: Max. value, Min. value, Last valueCan store 96s dataTime Base: 6MHz Quartz crystalDetecting Distance: 50~500mmPower Consumption: Approx 55mAMeasuring Range: 2.5~99,999RPMResolution: 0.1RPM(2.5~999.9RPM)1RPM(over 1,000RPM)Total Test Range: 1~99,999Frequency Range: 1~1,666.6HzResolution: 0.01Hz Battery: 4x1.5V AA Size Battery or to externalDC 6V Regulated power supply

Photo Tachometer, Non-contact tachometer