Aerates ponds from 2,000 to 8,000 gallons. Includes: KA20 high efficiency compressor with 6 feet grounded power cord. (1) 25 feet of 3/8 inch EasySet self weighted airline, (1) KoiAir Membrane Diffuser, and all necessary fittings. 3 year warranty. Specs: 115V, 17 watts, .80 CFM airflow, estimated cost per month: 78 cents to run 24/7.