ProMariner ProTournament 500 Elite Series3 5-Bank On-Board Marine Battery Charger One Size. With true rated output amperage and models up to 50 amps with Distributed-On-Demand charging Technology ProTournament delivers the fastest charge times in its class. Designed to innovate and boasting 3 distinct industry 1st patent pending features. Package Contents: ProMariner ProTournament 500 Elite Series3 5-Bank On-Board Marine Battery Charger ProMariner 53505: ProTournament 500 Elite Series3 5-Bank On-Board Marine Battery Charger One Size