NEW Testo 470 Tachometer Speed Revolution Meter Speedometer Tester Rotation wi
Resolution 0.01 rpm (+1 to +99.99 rpm). 0.1 rpm (+100 to +999.9 rpm). 1 rpm (+1000 to +99999 rpm). Range +1 to +99999 rpm. Probe type RPM (optical). Range +0.1 to +19.999 rpm. Battery type 2 AA batteries.