One outlet, discrete outdoor weatherproof water garden air pump kit  Increases oxygen for a healthy pond. This product replaces the previous model Pond Air 1 which may still be available in some stores.  Key Features:  Outdoor weatherproof water garden air pump Complete kit Increases oxygen in warm weather Helps prevent freezing during the winter, reducing the potential build up of toxic gas. Treatments and medications can reduce oxygen levels in your pond. Support your fish with additional aeration and circulation when they need it most