Display: 5digits 18mm(0.6") Yellow green backlight

LCD Accuracy: ±(0.05%+1 digit)
Sampling Time: 0.5 sec(over 120RPM)
Range Selected: Auto - Ranging
Memory: Last value,Max. Value,Min.value,can store 96s data.
Time Base: 6MHz Quartz crystal
Power Consumption: Approx 45mA
Measurement:
CONTACT TACH               0.5 to 19,999RPM
SURFACE SPEED(m/min) 0.05 to 1,999.9(m/min)
SURFACE SPEED(ft/min)  0.2 to 6,560ft/min
Resolution:
CONTACT TACH:  0.1RPM(0.5 to 999.9RPM)
　　　　　　　　 1RPM(over 1,000RPM)
Surface speed(m/min) 0.01m/min(0.05 to 99.99m/min)
　　　　　　　　 　      0.1m/min(over 100m/min)
Surface speed(ft/min)    0.1ft/min(0.1 to 999.9m/min)
　　　　　　　　　       1ft/min(over 1,000ft/min)
Power Suply: 4X1.5V AA Size Battery or to external DC 6V   regulated  power supply