Manufacturer Part Number: DT-107A|Tachometer Type|ContactAccuracy|0.006 1 Digit (6 RPM Max) (10000 to 25000 RPM)%; 0.06 (0.10 to 999.9) RPM; 0.6 (1000.0 to 9999.9) RPMDisplay Type|LEDMinimum Measurement|0.10 RPMMaximum Measurement|25000.00 RPMMinimum Resolution|0.001 RPMMaximum Resolution|0.0010 RPMMeter Width (mm)|60.00Minimum Target Distance|Maximum Target Distance|Battery Chemistry|Batteries Included|YesBattery Size|AANumber Of Batteries|2Meter Length|Meter Thickness|Meter Width|Sensor Type|Diameter|Includes|(2) Cone Adapters; 3-1/2" Extension Shaft; Carrying Case; Funnel Adapter; Master Wheel; NIST CertificateUNSPSC Code|41112802