FEATURE
1. Low cost contact Tachometer.Electronic LCD Display.
2. Measure and read by pressing either main key or the bottom key for any up and down
    direction to operate.
3.  Low battery icon indicator shows weak energy.
4.  Disable sleep mode .
5.  Units: RPM ( Rotate per minute )
     M / MIN ( Meter per minute )
     FT / MIN (Feet per minute)
     YD / MIN (Yard per minute )
6.  Hold function to freeze rotating speed .
7.  Permits readings to a resolution of 0.001RPM
8.  Power Supply: 9 volts battery.
9.  Standard package including Meter, battery , spare wheels and manual.
10. Auto Range Function

Major parameters Specification

Accuracy:
- 10.000~99999 RPM 0.001/ 0.01 /0.1 /1 0.04% +/-2dgts
- 1.0000~9999.9 M/MIN 0.0001/ 0.001/ 0.01/ 0.1 0.04% +/-2dgts
- 3.0000~30000 FT/MIN 0.0001/ 0.001/ 0.01/ 0.1 0.04% +/-2dgts
- 1.0000~10000 YD/MIN 0.0001/ 0.001/ 0.01/ 0.1 0.04% +/-2dgts
- Power Consumption: 0.2 uA (IdIe) 25mA(Measurement)
- Time base: 4.0 Mhz Quartz Crystal
- Power: 9 volt battery
- Sampling time: 1 second ( >60 rpm) > 1 second ( 10 to 60 rpm)
- Dimension: 145(L)x50(W)x33(H)mm
- Weight: 140g
- Auto Power off in 20 minutes non-operation.