Product synopsis 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:GED2600P Application: 2-CIRCLE 1,2,3,4-cylinder 4-CIRCLE 1,2,3,4,5,6,8- cylinder Measurement range: engine 100-9999r/min Detection method: engine electromagnetic induction Resolution:0.1/1 With RS232C interface Accuracy: ±(0.05%n+1d) MAX value HOLD Auto power off Operating conditions: 0-+45℃(32℉-104℉),≤90%RH Power supply: 2x1.5V AAA (UM-4) battery Dimensions: 100x35x23mm Weight (including battery): 50g