... tach range: 2.5~99,999 RPM 2)resolution: 0.1 rpm / 1 rpm 3)MAX,MIN,last value memory, can store 96s ... : DT6234B5 digits 18mm (0.6") Yellow backlight LCDAccuracy: ±(0.05%+1 digit)Sampling Time: 0.5sec(over 120RPM)Range Select: Auto ... .5~99,999RPMResolution: 0.1RPM(2.5~999.9RPM) 1RPM(over 1,000RPM)Total Test Range: 1~99,999Battery: 4x1.5V AA Size ...