Features 1. Function: Dual battery selector switch allows switching between isolated battery packs to all loads or combining battery packs to all loads. Make-before-break contact design enables switching without interrupting power. 2. Current: 300A continuous rating is suitable for use on gasoline-powered boats. 400A intermittent rating indicates the maximum current load for a specified short duration. 3. For Use with 2 Batteries: Isolator switch enables selection between batteries for starting and charging, or operation of both batteries in parallel. Compatible with 6-32V systems. 4. Universal Application: Dual battery disconnect switch is designed for broad compatibility with marine, boat, RV, heavy-duty truck, and modified vehicle applications. 5. 15mm Studs: Nickel-plated copper studs provide high conductivity and corrosion resistance. Studs accommodate M8 ring terminals. 15mm stud length supports multiple cable connections. Specification Item Type: Battery Selector Switch Material: Nickel-plated copper Switch Position: 4 (OFF-1-BOTH(1+2)-2) Battery Combination: Yes Operating Voltage: 6-32V DC Continuous Current Rating: 300A Peak Current at Startup: 400A Number of Terminals: 3 Terminal Size: M8 Terminal Length: Approx. 15mm (0.59in) Contact Design: Make-before-break allows power continuity during battery switching Application: Suitable for Marine, Boat, RV, Heavy-Duty Truck, Modified Vehicle Package List 1 x Battery Selector Switch 3 x Plug