Best Way to Disconnect Battery: This battery isolator switch can be controlled by flipping to a 90° counterclockwise position, it is used for 12-48V DC systems to isolate and secure the electrical system, it can be used independently or paired with other switches, provides a simple and economical way to disconnect batteries. Easy Installation: Refer to the wiring diagram for installation, sturdy ABS plastic housing, durable for safe use, the back cover insulates the terminals against short circuits. Heavy Duty: 300A continuous at 12V DC, 1000A momentary at 12V DC, On/Off positions, 2 mounting holes (10mm diameter) for 10-12mm screw terminal (not included).< /p> Wide Application: Ignition protection, safely installed on boats or gasoline powered vehicles, widely used in boats, small yachts, RVs, cars, camper vans, commercial vehicles, battery packs and other 12-48V devices. Safe Use: Safely disconnects the battery to avoid battery energy consumption when the vehicle or boat is not in