... oil free silent air pump, 480W 2) durable and stable, 3) electricity saving, high reliability and long lifespan 1, noiseless oil free air pump ... hours. Lower energy consumption: Compared with normal pump can save energy>35%.Lower noise: No ... higher than 60DB.Green environmental protection: No oil lubrication, air supply is cleaning and drying. ... CP: Tracy 480W mute oil free air pump compressor part