The Rule 24V Automatic Bilge Pump features computerized operation and does not require a float switch. It has a stainless steel shaft, water cooling and a vibration-free centrifugal impeller. The pump will turn on every 2-1/2 minutes to sense for water, and when water is present the pump will run until the water is removed. The strainer bases can be snapped off for cleaning. It can run dry without damage and are non-sparking.