The Model 501K-1 is a Manual Engine Control Module, which has been designed to manually control the engine via a key switch on The front panel.The module is used to start and stop the engine, indicating fault conditions; automatically shutting down the engine and indicating the engine failure by LED giving true first up fault annunciation.SPECIFICATIONDC Supply----9~33V continuous.Alternator Input Range----15~305V AC Alternator Input Frequency---- 50~60Hz at rated engine speed.Magnetic Input Range----05V~+/-80VMagnetic Input Frequency----2300Hz~6000HzStart Relay Output----16 Amp DC at supply voltageRun Relay Output----16 Amp DC at supply voltageAlarm Output----1Amp DC at supply voltageOperating Temperature Range----- -30~70celsiusColour: blackMaterial: plasticPackage Contents:1 x Engine Control Module2 x Accessories2 x KeyOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.