The new Liberty Pumps PC442-Series features a primary pump and the new 442-10 Amp-EYE backup pump system pre-assembled from the factory. The primary sump pump (Model 237) is a lightweight, high performance submersible pump with aluminum housing for superior motor cooling. Quick-disconnect 10 ft. standard power cord allows replacement of cord in seconds without breaking seals to motor. The 442-Series StormCell battery back-up pump systems feature high-output pumping, an energy efficient DC pump for longer run times and professional-grade charger/controllers. This back-up system features NightEye wireless technology for remote monitoring and notifications. Batteries sold separately.