Blue Sea 7701 ML-Series Solenoid w/Contura Switch 12VDC 
Manual Control: No Coil Voltage: 12V DC
500 Ampere continuous rating for use as a remote battery switch for inboard gasoline or diesel engines, reducing long cable runs
Magnetic latch only draws current when changing state of switch, drawing no current in "ON" or "OFF" state
Silver alloy contacts provides high reliability for switching live loads
Optional manual switch provides an added level of safety allowing control with or without power, and offering lockout capability for servicing
3/8" copper studs, using Blue Sea Systems superior one piece technology, suitable for 300 Amperes continuous rating and large cable connections
WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.