The marine battery disconnect device is used to isolate the electrical system. It can be used independently or locked together with other . Very easy to install, universally used for marine boat, ship, yacht, RV, truck, also electrical equipment's . Features -Color: Assorted. -Material: Plastic, brass. -Size: About 10.00X10.00X8.50cm/3.93X3.93X3.34in. -Working current: 600A. -Instant current: 2500A. -Product voltage: 12V-48V. -Product life: 1000 times. -Bolt size: . -Product operation: ON and OFF. - Mainly made of brass and plastic, safe and durable, you can use it with confidence. - It has a multi-protection design, it is safer to use, and can easily help you disconnect the power. - The product is easy to use, can be installed stably, and is very convenient. - It has a wide range of uses and is suitable for most types of vehicles and RVs. - It is manufactured with professional technology to ensure the durability of the product and can work for you for a long time. Package list: 1 x power-off 4 x bolt nuts 1 x wrench 4 x terminals 4 x heat shrinkable tubes