Blue Sea Systems Battery Switch m-Series ON/OFF with Knob, part number 6006, is a Single Circuit ON-OFF switch. Switches a single battery to a single load group. IP66 waterproof, ISO 8846 and meets ABYC requirements. Ignition protected—safe for installation aboard gasoline powered boats. Make before break contact design allows switching between battery banks without power interruption. Continuous Rating: 300A, Maximum Voltage: 48V DC. Robust redesign done in July 2017. Premium warranty & support.