Kit includes a BEP Marine Battery 701S Battery Switch, a BEP Marine Voltage Sensitive Relay (VSR), and a GIL Marine Composite Battery Box plus all necessary wiring and hardware Allows you to keep one battery isolated at all times for reserve purposes Please verify your own fitment Brand new, genuine Yamaha BEP Marine Dual Battery Kit. This is a factory original equipment part, not aftermarket. Fits: Fits any single battery boat with room for another group 24 battery.