Feature 1Function: Dual battery selector switch can switch isolated battery packs to all loads or combine battery packs to all loads, make before break contact design allows switching without interrupting power. 2Current: The 300A continuous rating is safe for installation on gasoline powered boats and the 400A intermittent rating is the maximum amount of current that can be loaded for a specified minimum period of time. 3For Use with 2 Batteries: Isolator switch allows selection between batteries for starting and charging or operation of both in parallel. This switch can be used with 632V. 4Universal Application: Dual battery disconnect switch is universal, can be widely used for marine, boat, RV, big truck, modified car. 515mm Studs: Nickel plated copper studs for maximum conductivity and rust resistance, studs can accept M8 ring terminals, 15mm stud length accepts multiple cable terminals.Item Type:BatterySelector SwitchMaterial: Nickel plated, copperSwitch Position: 4 (OFF-1-BOTH(1+2)-2)Battery Combo: YesWorking Voltage: 6-32V DCContinuous Rating: 300AInstantaneous Current at Startup: 400ANumber of Binding Posts: 3Terminal Size: M8Terminal Length: Approx. 15mm/0.59inFunction: Make before break contact design allows switching between battery packs without interrupting powerApplication: Suitable for Marine, Boat, RV, big truck, modified car .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x BatterySelector Switch3 x Plug