Material: This main battery switch is made of aluminum alloy and sturdy plastic. It has good conductivity as well as resistance to heat and moisture. Water, resistance to corrosion and long service life. Features: Color: Black + Red, Battery Isolator Switch with Button, Rated Voltage: 12V-24V, Rated Current: 200A Function: Quickly disconnect the circuit to prevent battery leakage and loss and extend battery life. Provide effective protection for your vehicle and avoid unnecessary energy consumption. Connection method: Connect the battery main switch to the battery main switch. the positive pole of the battery cable. Use the power switch to disconnect and reconnect the battery. Application range: The battery protection switch can cut off the vehicle's power supply to prevent fire. It guarantees safety. and is ideal for cars, yachts, motorcycles, caravans and boats.