Function: 1. Premium Material: The battery switch is made of premium quality ABS and nickel-plated red copper material, stainless, durable and durable. 2. Function: The pre-open contact design allows you to switch between battery packs without interrupting power supply, with AFD. 3. Excellent performance: Good electrical conductivity, IP66 waterproof, prevent strong water splashing, with ignition protection, safe and reliable. 4. Simple installation: installation is simple, mounting holes accept 1/4 inch (M6) screw, 1/2 inch (M12) clamp screw, convenient to use, save your efforts. 5. Wide application: 500A continuous rated power suitable for outboard engines and small gasoline or diesel engines, ideal for motorhomes or boats. Specification: Item Type: Battery Disconnector; Material: ABS, nickel-plated red copper Switch Type: Heavy Duty Selector 4-Position Battery Switch with AFD Switch positions: 4 (OFF-1-2-12) Battery Combination: Yes Alternator Field Disconnection: Yes Maximum voltage: 32 V DC Twisting of the clamping pin: 220 in-lb (24,86 Nm) Intermittent rating: 700A (5 min) Start-up rating 30 s: 1600A Battery Inputs: 2 Clearance for 4/0 AWG cables: Approx. 27.94mm/1.10in Number of cables to meet the ratings: two cables or terminal Cable size according to ratings: 4/0 AWG (120 mm²) Mounting Holes: Accept 1/4 inch (M6) screw Pin Material: Galvanized Copper Clamp Pin Size: 1/2 inch (M12) Function: "Make Before Break" contact design allows you to switch between battery packs without interrupting power supply Application: Ideal for boat or RV List of packages: 1 x battery disconnector 4 x fixing screw