Red = check connection (by battery). Green = alternator power on. Yellow = charging trolling batteries. Turns off when engine not in use. Low profile extruded aluminum enclosure.Waterproof and corrosion resistant design. Amps per Bank: 10 Amps. Box Dimensions: 5"H x 9"W x 16L WT: 9 lbs. The item "Minn Kota MK-2 DC Alternator 2 Bank 10 Amp (20A) Marine 12V Boat Battery Charger" is in sale since Monday, February 29, 2016. This item is in the category "Consumer Electronics\Vehicle Electronics & GPS\Other Vehicle Electronics". The seller is "thesmarte-mart" and is located in Bayville, New Jersey. This item can be shipped worldwide.