1High Power Capacity: With a rated current of 300A, this battery disconnect switch can withstand high power loads, ensuring safe and reliable power cutoff and isolation. 2Dual Circuit: This switch features a dual circuit design, allowing for simultaneous disconnection of positive and negative connections, effectively preventing electrical leakage and battery drain. 34 Position Selection: The switch has 4 positions, allowing you to choose the appropriate position according to your needs, enabling easy operation and control. 4Wide Applications: It is suitable for various boats, cars, trucks, trailers, and motorhomes, and can be used for applications such as power cutoff, anti theft, and battery maintenance. 5Waterproof and Dustproof Design: The master switch is designed to be waterproof and dustproof, providing additional protection for long term reliable use.