4.Widely Applicationwaterproof battery isolator selector switch is suitable for various vehicles, including cars, off-road vehicles, trucks, motorcycles, boats, and more. 1.Battery Disconnect SwitchContinuous rating: 200Amps 32VDC Max. Intermittent rating: 300Amps. Cranking rating: 1000 Amps 5 sec. Contact resistance: 50m ohm. Max insulation resistance: DC 500V 100M ohm. Min dielectric strength: AC 1000V 1 minute, DC 2000V 1 minute. Operation temperature: 30 +60. Switch function : 3P SPST ON-OFF-OUT. Mounting hole : 38mm 2.Premium MaterialMade of heavy-duty ABS plastic, our battery power cut-off master switch is built to withstand harsh marine conditions and ensure safety. 3.Disconnect Battery ProtectionThis battery isolator switch can eliminate any power draw from the battery when vehicle or boat is not in use. It provides a secure disconnect of the battery and offers 3 positions: ON OFF and OUT. Turn to "OUT" remove the knob so that the switch can't be turned on. 5..Easy to UsePlug and play, this power disconnect switch has a compact size, sleek modern appearance, and offers easy installation and cable connection. The mounting hole size is 38mm.