Offers all of the features found in models costing more than twice as much. This special model of the A100 uses strong magnets to attach to the sump rather than the suction cup mount supplied with the standard model. Pets and Ponds made this request to the manufacturer who custom made them for us. Features DC Electronic 12V Pump Safe for use in Marine or Freshwater Patented Optical Sensor with great resistance to premature top ups caused by small waves in the sump. Floating Sensor with safety cover provides added safety by turning the 12 volt pump off in the event that the sump level reaches the float. This will also initiate an audible alarm. Specifications