Experience true peace of mind with the Basement Sentry STBC301 High-Performance Sump Pump Combo Platinum System from Zoeller at Home. This system features automatic self-testing and real-time monitoring of the primary pump, ensuring optimal performance at all times. When the power goes out, rest assured knowing your basement is protected. The system includes a 1/2 HP primary sump pump and a 12V back-up sump pump, pre-assembled for easy installation. Equipped with a high-capacity primary pump, back-up pump, controller, alarm system, battery charger, PVC pipe with fittings, and an in-line check valve, the Basement Sentry has everything you need for comprehensive protection. With a rapid charger that works 17 times faster than the leading competition and a maintenance-free battery when using a Basement Sentry battery, this system offers professional-grade reliability. Plus, it directly replaces a 115V primary sump pump for seamless integration. This item does not come with a battery.