Boat and RV owners, this Pactrade battery selector switch is a must-have for managing your dual battery systems! Rated for 175A continuous duty at 12V and 300A intermittent, it's built to handle serious power demands. The Bakelite base and knob are durable and resistant to the elements, making them perfect for marine and RV environments. The knob gives you four clear positions: Battery 1, Battery 2, Both, and Off - so you can easily select which battery bank to draw from, combine them for extra power, or shut everything down completely. The 5.2x5.2 inch dimensions make it compact enough to fit in tight spaces while still being easy to operate. Installation is straightforward with the included wiring diagram, and having this switch means you'll never get stranded with dead batteries again. You can run accessories off one battery while keeping the other reserved for starting, or combine both when you need extra power for winches or other high-draw equipment. The quality construction ensures reliable performance season after season, and the clear labeling prevents confusion when you need to make quick changes. Whether you're on the water or on the road, this simple switch gives you complete control over your power system and provides peace of mind knowing you can manage your battery resources effectively.