Make sure the main battery is always and ready to start the vehicle. It can charge two batteries simultaneously and isolate them from each other when the vehicle is turned off. The relay set comes with complete accessories and can be installed directly without purchasing any other parts. Made of high-quality plastic materials, it is shockproof and dustproof, ensuring maximum strength and durability, with a long service life The waterproof rating reaches IP65, which means it can be safely used even in dusty, humid and unexpected extreme weather conditions It is mainly used in applications such as ships, yachts, steamships, off-road vehicles, campers, recreational vehicles, caravans, four-wheel drive vehicles, and leisure vehicles. Name: Dual Battery Isolator Kit Material: Plastic + metal Color: As Shown Scope of application: Battery Item Type: Cables, Adapters & Sockets Waterproof rating: IP65 Product voltage: 12V Continuous current: 100-120A Instantaneous current: 160A Ambient temperature: -20 to 50 Package Contents: 1 set Isolator kit(61 PCS) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.