1Electromagnetic motor, piston linear reciprocating movement to produce airflow, more reasonable mechanism. 2The cylinder and piston adopt new wear-resistant material, low energy consumption, large exhaust capacity and higher air pressure. 3Oil - free lubrication design, compressed air more pure. 4Aluminum alloy with streamlined design for good heat dissipation. 5Base design, anti - slip, anti - jitter, the four sides can be fixed by punching. 6Suitable for aquiculture and oxygenation of fresh aquatic products in restaurants and market stalls. It can also be used as a food machine, bath, medical equipment and art spray, and neon sign production.