12V. Pumps up to 3300 GPH at 0'. Reinforced thermoplastic battery back-up sump pump system. Reliable reed float switch for automatic operation. Professional grade back-up system keeps battery properly charged, requires (1) 40 amp/hr or 75 amp/hr deep cycle battery (sold separately). Alarm lets homeowner know back-up system is active. Designed for easy installation without any major plumbing changes. Corrosion-resistant thermoplastic construction. Battery charger keeps battery properly charged. When processing claims please refer to mydoitbest.com plumbing home page for instructions. Pump serial number is required to process claim.