Enjoy the open water with confidence when you equip your boat with the SeaSense 300A Battery Switch. This battery switch features 4 modes: off, 1, both and 2 for convenience and is constructed from polyethylene and marine grade metals for noncorrosive durability. The vapor proof and ignition protected design allows for safe, reliable use, while the reflective on and off label encourages visibility for convenient operating in low light conditions.