Item Name: Yacht Dual Battery Isolator Car Starter 12V AMP 500A Relay On/Off Power Switch. Description:Between Contact and coil: 750VAC (for one minute/sec)Type: Starter Solenoid RelayName:Car Starter Dual Battery Isolator RelayShock Resistance:Operations Extremes: 10g,Damage Limits: 100gSize app: 5*7.4*7.6cm,Bottom Hole Max Length 6.7cm,Bolt Dia 0.8cmColor:BlackDielectric Strength Between Open Contacts 500VAC (for one minute/sec)Temperature Range: -30Celsius to +80CelsiusOperate Time: 25msVibration Resistance: 10 to 55Hz, 1.5mmInsulation Resistance: 100m ohm Min at 500VDCMaterial: Metal/PlasticRelease Time: 10msPackage Includes:1* 500A RelayNote:1.Please allow 1-3mm error due to manual measurement. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!