1 Set Aquarium Air Pump with Air Stone Silent USB Power Mini Fish Tank Oxygen Pump for Outdoor Fishing - black Description: With the characteristics of small in size and USB type, the oxygen pump can be powered by mobile phone chargers, power banks, car phone chargers, computers, etc. It is very convenient to carry and use when going out fishing. High-quality air bubble stone can produce finer bubbles and enhance the effect of dissolved oxygen. And 4.3mm large air outlet is compatible with 4mm air tube. The oxygen pump is silent and energy saving, which can provide a comfortable and fresh water environment for your fish. Made of high quality ABS material, the aquarium oxygenator is eco-friendly and durable. The length of the oxygenator is about 4cm, the width is about 2.8cm, and the height is about 8.3cm. It is suitable for aquarium oxygenation, outdoor fishing, seafood oxygenation, etc. Item Name: Aquarium Air Pump Material: ABS Color: Black, White, Pink Features: Silent, Energy Saving, Portable Size Details