Distributed-On-Demand Technology-chargers automatically sense and distribute 100% of available charging amps to any one bank or combination of all banks. Waterproof and saltwater tested charger is designed for any combination of group 24, 27 and 31 batteries. Input voltage 90-240 VAC, 50-60 Hz (Handles US and International power sources) More amps per bank for faster charge times Automatic multi-stage charging 3 Charge profile digital battery type selector: Lead Acid , AGM , & Gel Expanded LED status center Extruded aluminum case and 5' length cables Two year warranty