The Brophy BSC-3 3 Pole solenoid battery isolator is a switch part designed for use in RVs, trailers, and campers. It comes with a 1-year warranty and is manufactured in China. The product is specifically a solenoid battery isolator with 3 poles, providing a reliable and efficient way to isolate the battery in your vehicle. Additionally, it is important to note that this product may contain substances known to cause harm, as indicated by the California Prop 65 Warning. For use with metal frame ground systems.