Check the listing for details. 1/2 HP 4.1 CFM Pond Aerator Pump Compressor Weighted Tube Diffuser System 2 Acre. Condition: New. Listed at 268.82 USD. 1/2 HP 4.1 CFM Pond Aerator Compressor Self Weighted Tube Diffuser System 2 AcrePackage Included: 1x Pond Aerator 2x Stainless Steel Clamp 1x Stainless Steel Aeration Diffuser 1x 100 Ft Air Hose 1x Time Controller 1x Manual Specifications Power 1/2HP, 400W Max Pond Size Up to 2 Acre Max Volume 4.1CFM/116L/min/1840GPH Low Noise Lever ＜60 dB Voltage AC 110V Item Weight 42 lbs / 19 kg Pump Size 13"L x 5.5"W x 8.3"H(33*14*21cm) Working Temperature 0~100 ℉ Features: ★Smart Time Controller If you need the aerator to work according to your time setting, you can plug the time controller. The timer also has various functions: child lock, countdown alarm, intermittent operation, and automatic timing switch operation. ★Thermal Protection System Our motor is equipped with a thermal protection system, allowing the pond aerator to stop working when the working temperature exceeds 275 ℉, thus avoiding damage to the pond aerator and increasing the lifespan of the machine. ★Powerful & Stable Operation Equipped with a 400W pure copper motor, it can aerate ponds up to 2 acres. Highly efficient and quiet 1/2 HP oil-free Rocking Piston Air Pump with maximum 4.1 CFM volume. The operating noise level is below 60dB, which creates a quiet and comfortable environment for your pond. The working temperature ranges from 0 ℉ to 100℉, which almost fits all seasons.