The Pondmaster AP-Series air pumps have been designed to satisfy the requirements of a multitude of water-related applications including oxygenating ponds and aquariums for a cleaner aquatic environment, promoting healthier fish and aquatic plant life, increasing the breakdown of fish waste, driving protein skimmers, and preventing icing-over in outdoor ponds. All AP-Series air pumps operate on standard 110V electric and come with a 6' power cord. The oil-less lubricated motor is designed to operate efficiently and save energy. For outdoor applications, it is recommended that the unit be enclosed to protect it from the elements.