Feature: 1. USB power supply, safe and reliable. 2. The air pump has good mute effect and will not produce excessive noise to affect fish and people. 3. With metal hooks on the oxygen pump, can be easily hung in the fish tank or other places. 4. Air stone, the dense bubbles provide plenty of oxygen to the fish. 5. Wonderful equipmen for fish tank, aquarium. Specification: Condition: 100% Brand New Item Type: Aquarium Oxygen Pump Material: Plastic + bubble stone Color: As picture shown Oxygen Pump Size: Approx. 7x3x3cm/2.8x1.2x1.2inAir stone size: Approx. 4x2x2cm/1.6x0.8x0.8inSoft air tube length: Approx. 107cm/42.1inSoft air tube diameter: Approx. 0.5cm/0.2in USB cable length: Approx. 148cm/58.3in Weight: Approx. 148g Suitable type: fish tank Product role: Air pump for increase oxygen . Package List: 1 x Oxygen Pump1 x Soft air tube1 x Air stone