... 6,8- cylinder Measurement range:engine 100-9999r/min Resolution:0.1/1 ENGINE TACHOMETER GED-2600PApplication: 2-CIRCLE 1,2 ... ,3,4-cylinder; 4-CIRCLE 1,2,3,4,5,6,8- cylinderMeasurement range: engine ... 100-9999r/minDetection method: engine electromagnetic inductionResolution: 0.1/1With RS232C interfaceAccuracy ...