air compressor, silent air compressor, oil-free air compressor, 1.ISO 9001 certificate 2. HIgh reliability 3. electricity Specifications: Model: HK-6EW-90Power: 2520WSupply Voltage: 220V AC ,50 HZ (220V AC, 60HZ 110V AC, 60HZ)Air Displacement : 300L/minNoise: 60-70db Tank: 90L Factory: