Basemeny Sentry Combo Sump Pump and backup sump pump features built-in WiFi to provide mobile monitoring and alerts. The system includes a high-capacity primary pump, back-up pump, controller, alarm system, 4X faster battery charger, PVC pipe with fittings and an inline check valve. This combination system will replace an existing primary sump pump for premium protection against basement flooding. It is designed protect your home during power outages. Works with sump basin's that areat least 18 In. wide by 22 In. deep.