300A Battery Knob Switch Dual Circuit 4 Wires Ignition Protection Removable IP66 Waterproof for Yachts RVs1. Dual Circuit: Simultaneously switches two isolated battery banks, circuits of different voltages, positive and negative lines with one simple ON/OFF switch, such as 12 volt and 24 volt.2. Ignition Protection: Make before break contact design allows switching between battery banks without power interruption. Isolating cover with snapon sections protects rear contacts3. Safe Installation: Ideal for marine or RV applications, can be securely mounted in gasoline powered boats. Case design allows surface, front panel, or rear panel mounting.4. Premium Materials: Red copper silver plated studs with 7/8in (22.22mm) length for maximum conductivity, accepts 3/8in and M10 ring terminals, and the metal materials is marine grade rustproof.5. Excellent Features: Tactile textures indicate knob position by feel only. Label with international ON OFF legends. Removable knob remains positively retained. ICON label set included for circuit identification.Specification:Item Type: Boat Battery SwitchMaterial: ABS + PC + Red Copper Silver PlatedContinuous Working Current: 300AMaximum Working Current: 450A (5min), 675A (30S)Maximum Working Voltage: 32VDCTerminal Size: M10Protection Level: IP66Application: Ideal for marine or RV applicationsPackage List:1 xBoat Battery Switch