Shop Nilight 2 Pack Battery Switch 12V 24V 48V 275A On/Off Heavy Duty Battery Power Cut Master Switch Disconnect Isolator for Truck Vehicle Trailer RV Marine Boat Yacht in high quality, support 2 Years Warranty. Fitting for cars, marine boats, RVs, campers, travel trailers, trucks, ATVs, UTVs, battery banks, and other devices. Design for 2 batteries, can switch to battery 1 / battery 2 separately or both on and off together. It is simple to install.