USB Charging Increases Oxygen Pump Mute Aquarium Work Equipment Feature: 1. USB power supply, safe and reliable. 2. The air pump has a good silencing effect and does not produce excessive noise that would affect fish and people. 3. With metal hooks on the oxygen pump, it can be easily hung in the aquarium or other places. 4. Aeration stone, dense bubbles provide fish with a lot of oxygen. 5. Great equipment for aquarium, aquarium. Specification: Item Type: Aquarium Oxygen Pump Material: plastic bubble stone Color: as picture shown Oxygen pump size: approx. 7x3x3 cm/2,8x1,2x1,2 inch Air stone size: approx. 4x2x2 cm/1,6x0,8x0,8 inch Length of soft air hose: approx. 107 cm/42,1 inch Diameter of soft air hose: approx. 0,5 cm/0,2 inch USB cable length: approx. 148 cm/58,3 inch Weight: approx. 148g Suitable Type: Aquarium Product Role: Air pump to increase oxygen List of packages: 1 x Oxygen Pump 1 x Soft Air Tube 1 x Aeration Stone