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. SPECIFICATION DC Supply- - 9-33V continuous. Alternator Input Range- - 15-305V AC RMS Alternator Input Frequency- - 50-60Hz at rated engine speed. Magnetic Input Range- - 0.5V-80V Magnetic Input Frequency- - 2300Hz-6000Hz Start Relay Output- - 16 Amp DC at supply voltage Run Relay Output- - 16 Amp DC at supply voltage Alarm Output- - 1Amp DC at supply voltage Operating Temperature Range- - - -30-70celsius Colour: black Material: plastic Package Contents: 1 x Engine Control Module 2 x Accessories 2 x Key Only 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.