On-Board Battery Charger 40A / 12V - 4 Bank - 120V InputGuest On-Board battery chargers have been redesigned from the inside out with the customer in mind. Our newest generation On-Board Marine battery chargers include leading advancements in digital charging technology and waterproof design/construction. Every Guest charger has a dedicated charging, sensing and control per bank. The easy to read graphics indicates the status of each battery bank through the charging process.Features:All high frequency, digital charging technologyFully automatic 5-stage performance chargingDedicated battery charging, sensing and control per bankExpanded LED charge status monitorWiring and battery fault detectionAuto-maintain energy saver modeUp to 40 percent lighter100 percent Waterproof (IP67) and shock resistant for all fresh and saltwater applicationsAll models are pre-wired for easy installationFor all 12 volt flooded and AGM lead acid batteriesBuilt-in safety: reverse polarity, over-current, over-voltage, over-temperature and ignition protection. In-line fuses for maximum DC wire protection.2 year warrantyWARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.