Item No.: C11C050
.5 Digital 18mm ( 0.6" ) backlight LCD.  
.Measuring range:  
.Photo tach:2.5~99999RPM.  
.Contact tach:0.5~19999RPM.  
.Surface speed:0.05~1999.9(m/min).  
.Resolution:  
.Photo Tach:0.01RPM(2.5~999.99RPM).  
                      0.1RPM(1000~9999.9RPM).  
                      1RPM(over 10000RPM).  
.Contact Tach:0.01RPM(0.5~999.99RPM).  
                          0.1RPM(1000~9999.9RPM).  
                          1RPM(over 10000RPM).  
.Surface speed:0.01m/min(0.05~99.99m/min).  
                             0.1m/min(over 100m/min).  
.Accuracy:±(0.05%+1 digit).  
.Sampling Time:0.5s (over 120RPM).  
.Detecting Distance:50~500mm.  
.Test Base:6MHZ quartz crystal.  
.Range Select:auto-switch.  
.Power Consumption:approx 45mA.  
.Power:3x1.5V AAA batteries.