Features: The product surface is made of high quality ABS material, stable air output, and durable Very low vibration, low power consumption, continuous operation, long life. Oil - free lubrication design, production of more pure compressed air. Noise level is 30 db, when working continuously, the noise level is below 30db. This Ozone air pump is widely used in ozone generator, oxygen generator, negative ion air freshener, medical equipment and other fields. Specification: Voltage: DC12v Flow rate: 8L/min Noise level: 30 db Size:11.5*6*5.5cm/4.5*2.4*2.2in Weight: 289g/10.2oz Wiring method: red:"+", black:"-" Package list: 1 x ozone air pump Note: To avoid water backflow, the air pump should be 20CM above the water surface, or install a check valve in the outlet pipe 1、The product surface is made of high quality ABS material, stable air output, and durable 2、Very low vibration, low power consumption, continuous operation, long life. 3、Oil - free lubrication design, production of more pure compressed air. 4、Noise level is 30 db, when working continuously, the noise level is below 30db. 5、This Ozone air pump is widely used in ozone generator, oxygen generator, negative ion air freshener, medical equipment and other fields.