Check the listing for details. 550W 5.2CFM Pond Aerator w/ Timer Lake Pond Aeration System 3/4 HP Up to 3 Acres. Color: Silver, Condition: New. Listed at 174.99 USD. Please feel free to contact us via eBay message or our service email if there is any problem. We will provide you with a satisfactory solution. Specifications Power 3/4HP, 550W Max Pond Size Up to 3 Acre Max Volume 5.2CFM/148L/min/2334GPH Low Noise Lever ＜60 dB Voltage AC 110V Item Weight 24.2 lbs / 11 kg Pump Size 13"L x 5.5"W x 8.3"H(33*14*21cm) Working Temperature 0~100 ℉ Package Included:1x Pond Aerator2x Stainless Steel Clamps1xTime Controller1x Manual 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 550W pure copper motor, it can aerate ponds up to 3 acres. Highly efficient and quiet 3/4 HP oil-free Rocking Piston Air Pump with maximum 5.2 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.