1、This is a more convenient car battery disconnect switch system, which can remotely control your car power system. 2、Proper maintenance will extend and protect the battery and engine life, which is suitable for large trucks, excavators, loaders and construction vehicles. 3、Silver contact interface, larger current and more durable, rated current 300A main switch silver contact interface, DC12V power system universal. 4、Can be used below 0, and the working temperature can even be used at ‑25° (minimum) or 80° (maximum). 5、A starting relay for the control panel, and an isolator can also be added to make a dual battery isolation relay. 1 x 300A Relay Item Type: Battery Disconnect SwitchMaterial: Aluminum Alloy + ABSPurpose: RelayRated Current: 300APeak Current: 600A Winch Start Relay, Can Also Be Equipped with Isolator to Make Dual Battery Isolation Relay.Rated Voltage: 12VDCContact Form: Normally OpenContact Switching Current: 1AContact Switching Voltage: 7.8VDC Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin