Complete set ready for delivery with an air pump (100 liters/hour), 2-meter hose, check valve, and air stone to supply aquariums with vital oxygen. Easy installation: Hang or place the air pump above the water surface, connect it to the hose equipped with a check valve and air stone, place the air stone at the bottom of the aquarium, then connect it – done! Low noise level (39 dB(A)): Sound-absorbing air chamber, rubber feet to prevent vibration, reinforced structural wall, electronically adjustable air volume, air connection with secure hose fitting. CE compliant, powerful: Airflow rate of 100 liters/hour - electronically adjustable with air pressure over 80 mbar with only 2.5 watts power consumption, check valve to prevent water backflow into the pump. Package contents: Air pump with air filter, 2-meter air hose, safety system to prevent backflow, air stone with a diameter of 2.5 cm. Dimensions: length 14 cm; width 6.5 cm (+ cable outlet), height 5.5 cm.