Pumps 40 GPM 0 ft. lift. Alarm sounds will notify you when the backup pump turns on and built in diagnostics. Charger will re-charge the deep cycle battery 2X faster than comparable units after use. This system includes a primary pump, back-up pump, controller, alarm system, battery charger, float switch, and battery box. | Basement Sentry 1/3-HP 12-Volt Thermoplastic Battery-Powered Sump Pump | Lowe's