... , 4.Can store 300 testin. Tachometer:1.Low battery alarming,2.Yellow-green back light,3.Memory the (max ,min ,last ... of cylinder rotate speed .Testing the rotate speed used to 2 stokes and 4 strokes,Can set the cylinder in ... 2,3,4,5,6,8,12 or set the impulse ... -19999RPMTemperature Range:0-200°CTemperature Resolution:±0.5°CTemperature Accuracy:±2°C Digital Tachometer