The SS5212 Supersub Smart Bilge by Whale, runs on a 12V system. It is part of the original award winning Whale low profile narrow automatic submersible electric bilge pumps, which have been proven for over 20 years. The Intelligent Control system automatically senses Bilge water level, and switches itself on and off when appropriate. It offers a multitude of features, which include: being retrofittable, is able to be fitted in confined areas on board including under engines or cockpit floors. It includes an easy to fit angled mounting bracket, along with the ability to be fitted deep in the Bilge, where other pumps cannot reach. It does not require a seperate bilge switch, is not affected by wave motion and is able to be manually overridden. Can safely be used with fresh or salt water. The spec for this pump are as follows: Open flow rate 650GPH (40 litres/min) It draws 3.2 Amps of current. Maximum discharge Head 3 metres. Hose connectors 19mm.