Touch tachometer: 1.Digital tachometer, 2.Large screen. (PHOTO/TOUCH TYPE)Touch tachometer,1.Digital tachometer,2.Large screen.Specification :MEASUREMENT RANGEROTATIVE VELOCITY:2.5~99,999r/min (PHOTO)2.5~19,999r/min (TOUCH)RESOLUTION:0.1/1,ACCURACY :±(0.05%n+1d)MEMORY:MAX/MIN/LAST VALUEPOWER SUPPLY:4X1.5V AA(UM-3)BATTERYDIMENSION:215X74X32mm Digital Tachometer