Features: high-pressure blower operation, the current consumption of the motor will increase with pressure and vacuum to increase high reliability: high compression ratio, bearing operating temperature is low maintenance easy no oil pollution: impeller rotation, not with contact with any part of the parts, so you can guarantee one hundred percent clean. Features: high-pressure blower operation, the current consumption of the motor will increase with pressure and vacuum to increase high reliability: high compression ratio, bearing operating temperature is low maintenance easy no oil pollution: impeller rotation, not with contact with any part of the parts, so you can guarantee one hundred percent clean.