Twin outlet – 330 L/Hr * Hailea Air Pump. * Silent Design. * Super Quality. * The product possess an advanced air-compressing system, damping system and multilevel muffler which is extremely low in noise. * The air-output can be adjusted freely. * Manual air-flow adjusting control. * The ACO air pump adopts special artificial rubber to keep a steady air output and pressure that can be adjusted freely. * The structure is compact. * No greasing or lubrication required. * Clean or replace air-tube,air-stone or sponge reqularly to obtain maximum pure air outlet. * Voltage:220-240V. * Frequency:50-60Hz. * Power: 6.5Watt. * Air output:4.5L/m. * Pressure:0.025MPa.