The PC441-10A sump pump combo system is a complete pre-assembled primary pump and 441-10A backup pump which is available in several primary pump models. The Model 441-10A emergency sump pump system is a mid-range product, falling between the base level 441 system and the higher-end 442 systems. The high output 12V battery operated pump starts automatically when the power fails. With a compact design, these systems come drop-in-the-pit ready, making onsite installs quicker and easier. The system also provides uninterrupted pumping in the event of a power outage or main pump failure.