Box contents: the package includes 1 battery switch, 2 keys and 1 waterproof cover. Effectively protect your vehicle from unwanted power consumption.Material: made of aluminium alloy and durable plastic, the switch is waterproof, corrosion resistant and oxidation resistant. A longer service life.Car / vehicle protection: quick disconnect circuits to prevent leakage current and loss of the battery, and extend the battery life.Easy installation: disconnect and connect battery with the on/off button. And waterproof cover to protect the keyhole from getting into dirt.ApplicationsBattery main switch for wiring into the positive side of the battery cable. It is ideal for cars, motorhomes, cars, vintage cars, caravans and boats, vehicle protection.Functions: - Prevent battery leaks. - Avoid damage to the car battery in extremely cold weather. - Prevent children from starting the car. - Avoid car theft. - Turn off the power immediately and prevent fires. Features: - High quality battery insulators for cars, trucks, boats and others; - Suitable for all vehicles with battery voltages of 12 V and 24 V. - Easy to use, just remove the removable red key to disconnect the battery. - 3 positions: start, stop and turn counterclockwise to unlock; - Avoid battery leakage during vehicle maintenance. - An effective way to prevent car theft; - Maximum continuous current: 100A, peak current: 500A for 5 seconds. Specification: Material: brass metal + plastic. Colour: red and black. Diameter: 57 mm (2.24 inches). Total height: 110 mm (4.33 inches). Width between two holes: 38 mm. Voltage: 12 V/200 A. Weight: 120 g (0.26 lb). Box contents: 1 x battery switch. 2 x keys. 1 x waterproof cover