air compressor, silent air compressor, oil-free air compressor, 1.ISO 9001 certificate 2. HIgh reliability 3. electricity Specifications: Model: HK-4EW-65Power: 1680WSupply Voltage: 220V AC ,50 HZ (220V AC, 60HZ 110V AC, 60HZ)Air Displacement : 200L/minNoise: 53db Tank: 65LWeight: 75kgs Dimension: 90*48*77cm Factory: dental air compressor(HK-4EW-65)