This Auto Meter BusPro-600s battery charger features six independent charging stations with a 5 amp rating per station. They use lights to indicate a defective battery, charging, maintaining, and improper connections. The battery chargers will remove sulfating by using a micro-controlled current pulse, and have an overcharging control to prevent any damage. Features: 6 independent charging stations. Connect up to three BusPro-600s together. Lights indicate defective battery, charging, maintaining and improper connections. Removes sulfation by means of a micro controlled current pulse. Maintenance output per station 13.2 Volts with 0 to 2.5 Amp variation as needed. 115 VAC Micro controllers: Each of 6 stations are independently controlled. Over charging: Each controller prevents over charging. Sulfating: Each controller removes sulfating automatically. Charge Mode: 5 Amps per station. Maintenance Mode: 13.1 volts with 0 to 2.5 amp variation as needed. Temperature: 0 to 120 degrees F.Humidity: 0 to 85 percent non condensing. Red LED only: One per station 'Steady' for Charging - 'Defective Battery' if flashing. Green LED only: One per station indicates 'Charged and Maintaining' ready for load test. Red & Green LEDs on: Indicates 'Topping of Battery'. Error: No lights indicate improper polarity or connection. Power: AC power. Clamp Leads: 6 feet 18 gauge. Expansion: Up to 3 BusPro units can be hooked together. Capacity: Optional AC-8 lead sets can charge 6 additional batteries. This reduces the amps per station to 2 1/2. This works well for motorcycle batteries. Size: 3 inches x 8 inches x 36 inches. Shipping Weight: 31 pounds