Easy to install and quick to change: battery main switch for 12 V/24 V DC systems. On/Off 2-position design allows easy turning of the key; battery isolator switch interrupts power in 1 second. Key can only be removed in the off position. Recommended for mounting on the negative battery terminal. Battery disconnect switch prevents discharge when the vehicle is not in use and interrupts power supply to help prevent theft. Long service life: battery switch constructed from strong, flame-retardant ABS plastic. Features M8 pure copper clamp and stainless steel hex nuts for improved conductivity. Resistant to high temperatures, rust, and corrosion. Provides protection against leakage and ensures durable, safe operation. Quick disconnection helps extend battery life and protects against unnecessary power consumption. Wide application: suitable for cars, vehicles, boats, yachts, caravans, motor homes, trucks, battery banks, and other 12 V/24 V systems. Can be used to control various electrical accessories such as spotlights, chassis lights, and fog lights for indoor and outdoor use. Ideal for maintaining battery charge during prolonged storage. Package includes: 1 x M8 battery switch, 1 x waterproof cover, 2 x cut-off keys, 2 x copper terminals, and 2 x insulator covers. Copper terminals simplify wiring connections. Insulator covers provide added safety by preventing direct contact with live terminals. Weatherproof cap helps protect the keyhole from dust and moisture. If you experience any issues with the isolator switch, a replacement will be provided or a full refund issued. Modern vehicles and marine craft equipped with multiple electrical devices continue to draw power even when idle, which can drain the battery over time. Older vehicles and boats may experience self-discharge due to insulation degradation. This battery isolator switch provides a simple solution to stop power flow and meet the needs of those modifying their vehicle or installing a battery disconnect system. Product includes: Battery Switch x 1 Cut-off Keys x 2 Insulator Covers x 2 Waterproof Hood x 1 Connection Terminals x 2