Premium Material: Our battery isolator is made of purple tinned inner core and ABS plastic. The use of tin plating can improve the antioxidant and discoloration performance of red copper, extend the rust protection time while not affecting the conductivity. High Safety: Our battery isolator has been Designed for safety reasons, the battery isolator cuts off the power supply to the vehicle or car battery, so that the battery inside will not be affected if you do not use the vehicle for a long time. and it can also save energy. Easy to use: Our battery isolator comes with with a clear switch label to mark the on/off position ON means open, OFF means closed, you just need to turn it according to your own needs to reach the desired switching state. Wide application: Our battery isolator has a compact design, elegant and modern appearance, sturdy and durable, so it is very suitable for installation in cars, buses, RVs, trucks, pickups, yachts and other models, and can be used as a main switch.