Application: 2 in 1 (Engine & Laser tachometer ) Applicable to the product departments of motor, fan, paper-product, plastics, chemical fiber, washing-machine, automobile, airplane, steamer etc. Model: GED2600 Application: 2-CIRCLE 1,2,3,4-cylinder 4-CIRCLE 1,2,3,4,5,6,8- cylinder Measurement range: engine 100-20000r/min Laser 2.5-99999r/min Detection method: engine electromagnetic induction Laser reflective Measuring range: 30-600mm Resolution:0.1/1 Operating conditions: 0-+45℃(32℉-104℉),≤90%RH Accuracy: ±(0.05%n+1d) Memory: MAX/MIN/LAST value Power supply: 4x1.5V AA (UM-3) battery Dimensions: 220x68x38mm Weight (not including probe): 164g