Nasmodo Aquarium air pump for fish tank rechargeable AC/DC noiseless air oxygen pump Air Aquarium Pump  (200 cm)

Voltage: DC 5V, Power: 2W, Output: 3 L/min, Pressure: 0.01pa. The bottom silicone pad cushion design reduces noise. Double hole oxygen supply, outgassing stability. Contained with rechargeable lithium battery (2600MAH). To be recharged fully, it takes about 8 hours. When charged fully the pump can keep working about 15-18 hours if in intermittent working condition it is about 30-33 hours. When power off, it can be moved to lithium battery operations automatically. It is charged in AC condition or in DC 5V. When charging red light is on when charged fully when red light is off. When the red light is flashing which means no power enough. Please recharge it in time. Press switch for the first time the green light is on; Press with twice it is flashing then it moves to intermittent working condition ;Press it third time it is off. If you do not use the pump frequently, please do not keep the pump in nonreactive condition. At least let it to be charged once every three months to avoid destroying the working life of lithium battery inside.