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. ged-2600 product synopsis model: eigine tachometer 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