Features: 1.High Quality Material: Battery switch is made of high quality ABS and red copper, with maximum conductivity, sturdy and durable. 2.Pratical Design: Make before break contact design allows switching between battery banks without power interruption, practical and convenient. 3.Safe: Marine battery switch with ignition protection and IP66 waterproof, can be safely installed on gasoline powered boats. 4.Simple Installation: The installation is simple and convenient, no complicated operation is required. 5.Application: 4 position battery switch can be used for yachts, RVs, modified cars, etc. Specification: Item Type: Battery Switch Material: ABS+red copper Continuous Operating Current: 300A Maximum Operating Current: 500A(5min), 900A(30S) Maximum Operating Voltage: 32VDC Terminal Size: M10 Protection Grade: IP66 Switch Gear: 4 gears, OFF-1-2- (1+2) Inner Stud: Copper plated with silver Function: Make before break contact design allows switching between battery banks without power interruption. Applications: Ideal for Marine or RV applications