The Haliea ACO 5500 series was designed with performance and user comfort in mind. These being done while still having a reasonable price point for the end consumer.

It includes an advanced air compression system and shock absorption system, multi-stage noise reduction design.
Using purpose made synthetic rubber components, the gas volume and pressure are kept constant while still achieving a low decibel.

The unit is quiet enough that one can appreciate one’s aquarium in a quiet room, and not be interrupted by the hum of a lesser model.

 Technical Specifications,

ACO-5501 Single outlet

Power: 2W
Voltage: 110 ~ 120V / 220 ~ 240V
Frequency: 50Hz / 60Hz
Pressure:  >0.01Mpa
Output: 1.3L/min
Decibels: <40dB
Weight: 0.15KG
Size: 125 × 57 × 52mm

ACO-5503 Double outlet  (controllable) 

Power: 4W
Voltage: 110 ~ 120V / 220 ~ 240V
Frequency: 50Hz / 60Hz
Pressure:  >0.015Mpa
Output: 3.5L/min
Decibels: <40dB
Weight: 0.45KG
Size: 147 × 75.5 × 65.5mm

ACO-5505 Double outlet (controllable) 

Power: 6.5W
Voltage: 110 ~ 120V / 220 ~ 240V
Frequency: 50Hz / 60Hz
Pressure:  >0.025Mpa
Output: 5.5L / min
Decibels: <45dB
Weight: 0.82KG
Size: 181 × 96 × 76mm

 ACO5505, ACO5503, ACO5501