Brand New Battery Isolator Disconnect Cut Off Power Kill Switch for Car Truck Boat ATV Battery Isolator Switch, 12V/24V Battery Cut Off Switch, Master Battery Disconnect Switch, Emergency Automotive On Off Switch for Boat CarFeatures:Battery Disconnect Switch: For use on batteries to isolate and protect the electrical system, to eliminate any power drain on the battery when the vehicle or boat is not in use, to safely disconnect the battery.Protective Cap: Equipped with a waterproof protective cap to better prevent dust and water from entering the keyhole. Simple to install and easy to use.Application: For use on DC 12V-24V systems, On/Off 2 position, maximum quiescent current: 12V 300 A. Recommended for installation on the negative battery terminal.Durable: ABS plastic and solid brass nut/washer, rust and corrosion resistant for safety and durability. Battery Master Disconnect Switch - Screw Size: M10 - 0.39", 2 mounting holes: 0.256", base diameter 2.28".Specification:100% Brand newMaterial: Plastic + CopperMaximum load: 300AVoltage: 12V-24VConnection: M10 Copper ScrewBase: 43 x 37 x 64mmStud: 6mmPackage included:1 x Battery Disconnect Switch 1 x Key 1 x Waterproof CoverProfessional installation is strongly recommended. No instruction is Included