Linear air pumps are a very efficient , low power consumption type compressors. Linear air pumps deliver air efficiency and high flow,low wattage upto 9.2 psi delivery pressure. Very long life, continuous duty, low maintenance compressors are very quiet with outdoor covers and power cord. 115V/60/1. For mutiple aquarium aeration, aquaculture, research ,pond /watergardening aeration application and for many air needs applications. Hakko Air Pumps are sleek in design. It is a small unit with surprisingly high output. The Hakko air pumps are built to last with a very durable body and mechanics meaning years and years of everlasting quality airflow. Hakko air pumps utilize linear- motor technology to reduce power consumption at peak effecieny. Oil-less operation so there is no need for lubrication making the Hakko air pump easy to maintain. See Keeton Industries diffusers and duraplate DDP-9 for ulilizing the air to obtain maximum oxygen trasfer rate efficiency in your pond.