Features 1、Safe And Efficient Design: Constructed with an excellent ABS housing and silicone sealing, the double battery automatic charger relay is engineered to withstand extreme weather conditions and vibrations. Its IP68 water proof rating guarantees good performance in dusty, damp, and unpredictable environments, making it an excellent choice for any off road application, whether on land or at sea. 2、Wide Application: The automatic double battery isolator functions effectively as if you have two independent power sources. This allows your accessories to be powered by the auxiliary battery when the engine is off, while still keeping the main battery charged and ready for action. It is suitable for use in a variety of applications, including 12V campers, caravans, RVs, ATVs, UTVs, boats, and other camping equipment. 3、Versatile Guard: Our automatic disconnect battery charger relay is designed to guard any 12V battery, significantly reducing the risk of battery drain. By preventing your primary battery from depleting, it ensures you have a fully charged battery when you need it 4、Multifunctional: The double battery isolator ensures that your primary battery remains charged by engaging at 13.3V and disconnecting at 12.8V. This important feature prepares your vehicle for good starts. When the engine is running and the starting battery is fully charged, the isolator simultaneously begins charging a secondary (auxiliary) battery, allowing both batteries to be charged efficiently from a single alternator. 5、User Friendly Installation: The double battery automatic charging relay is designed for easy installation and compatibility with various vehicles and equipment. Its straightforward setup enables users of all skill levels to enhance their battery management system quickly and efficiently, ensuring that your vehicle's power supply remains robust and dependable for all your needs. Specification Item Type: Double Battery Isolator Material: Flame Retardant ABS Rated Voltage: DC12V Rated Current: 140AMP Water Proof Grade: IP68 Package List 1 x Battery Isolator 4 x Screws 1 x Cable Lug 1 x Manual