MotoMaster Nautilus Portable Power Pack & Battery Booster/Jump Starter with Air Compressor, 800-Amp, 400W Had this for a couple years, but I don’t have my boat anymore – it’s just sitting around. This unit is a rugged, reliable battery booster that also works as an air compressor, power station, and emergency tool. Key Features: • 800-amp jump starter – boosts dead vehicle batteries with ease • Built-in air compressor – great for tires, inflatables, etc. • Water-resistant design – ideal for boats, trucks, or job sites • 400-watt power inverter – run small tools or electronics • Can charge via vehicle 12V lighter port