1.Display LED 2.Type:photoelectricity /Contact 3.Rotate speed 2.519,999 ROUND/MIN 4.Certificate: CE Approval HP2236B tachometer1. FunctionDisplay LEDType:photoelectricity /ContactRotate speed 2.519,999 ROUND/MINAccuracy ±(0.05%n+1d)Resolution 1r/min(2.5999,9 RPM)memeory value MAX/MIN/LAST VSLUEPower supply 4×1.5 AA(UM-3)BATTERYCertificate: CE Approval2. Packing Each item in Color BoxDimension: ...