Wayne ISP50 SmartPump 3,780 GPH AC/DC Battery Backup Sump and Primary Pump System The AC/DC SmartPump system operates during power outages and thunderstorms. Pumps 3780 GPH in primary or backup modes to protect your basement during heavy rain. High powered alarm alerts homeowner if there are power or pump problems Prewired to connect to home security system. Accepts standard marine type batteries or maintainence free sealed batteries