1、The relay has a heavy duty silicone sealed interior with a reinforced shell that protects the isolator from water damage and dust contamination, and prevents your isolator from harsh conditions. 2、The smart battery isolator is capable of smart charging, allowing you to use a separate battery to run your accessories when the engine is off, preventing the starting battery from being depleted by the device. 3、The VSR battery isolator of the relay can ensure that your main battery is always fully charged without worrying about getting stuck on the road due to the exhaustion of the battery. 4、The isolator kit is easy to install, does not require an alternator or ignition connection, and you do not need any additional components to complete the installation. 5、This is an IP65 certified relay that can be used for off road purposes, is shockproof and dustproof, and can be used safely in harsh conditions. Item Type: Voltage Relay Material: Resin Nylon Copper Continuous Current: 140A 1 x Smart Battery Isolator 1 x Red Cable 1 x Black Cable 2 x Positive Marine Battery Terminal 1 x Negative Marine Battery Terminal 1 x Insulated Blue Ring Terminal 2 x Insulation Sleeve Red 1 x Insulation Sleeve Black 6 x Nylon Cable Tie 2 x Heat Shrink Ring 4 x Screw 3 x Copper Terminal 3 x Washer 1 x English User Manual