On/Off Switch: This heavy duty 300A battery disconnect switch 12v features single circuit On/Off 2 position and 2 x 3/8" (M10) copper studs. The "On/Off" functionality is straightforward yet effective, offering an easy way to manage power without fuss Superior Quality: The top post battery disconnect switch is made of flame resistance nylon material, durable made for safety use, rear cover insulates terminals against any short of circuits. The boat battery switch also features IP66 waterproof and dust proof, which is safer and more durable Widely Application: This 300A battery shut off switch is suitable for 12V 48V DC system to isolate and secure the electrical system. It is widely used for Car, Marine, Boat, RV, Camper, Travel Trailer, Truck, ATV, UTV, Battery Banks and other electrical equipment switches Ignition Protected: Cranking: 900A for 30 seconds, 500A for minutes; Continuous Rating: 300A; Maximum Voltage: 48V DC. Our battery disconnect switch can prevent current fluctuations during ignition, which makes your use more safe and reliable Easy to Install: This car battery disconnect switch comes with 2pcs copper conductive sheets mounting brackets. Our battery shut off switch 12v can be installed on the positive of the battery, which is in line with your operation habit. Our unique design also makes your installation more flexible and simple compared with other's limited product design